阅读说明：本技术 一种激光器 (Laser device ) 是由 范一松 郭强 郭欢 陈春城 于 2019-12-02 设计创作，主要内容包括：本发明公开了一种激光器,包括：第一调节装置进行旋转,可使第一束激光穿过第一调节装置中第一旋转盘之通光孔、或使经过第三调节装置进行90°反射的第二束激光在第一旋转盘之45°全反射镜上再进行90°反射,从而与第一束激光同光路轮流输出；第二调节装置进行旋转,可使前述已经同光路输出的第一、第二两束激光穿过其第二旋转盘之通光孔,或使经过第四调节装置进行90°反射的第三束激光在第二旋转盘之45°全反射镜上再进行90°反射,从而使得第三束激光与第一、二束激光同光路轮流输出。利用本发明实施例,能够使得三路激光轮番发出,并沿着各自的路线汇合到主光路形成同路激光输出,不需要每次进行光路对准,提高合束输出的效率。(The invention discloses a laser, comprising: the first adjusting device rotates to enable a first laser beam to pass through a light through hole of a first rotating disc in the first adjusting device or enable a second laser beam reflected by a third adjusting device at 90 degrees to be reflected at 90 degrees on a 45-degree total reflection mirror of the first rotating disc, and therefore the first laser beam and the second laser beam are output in turn on the same light path; the second adjusting device rotates to enable the first and second laser beams output by the same optical path to pass through the light through hole of the second rotating disc, or enable the third laser beam reflected by the fourth adjusting device at 90 degrees to be reflected at 90 degrees on the 45-degree total reflector of the second rotating disc, so that the third laser beam and the first and second laser beams are output by turns on the same optical path. By utilizing the embodiment of the invention, three paths of laser can be emitted in turn and are converged to the main light path along respective paths to form the same path of laser output, the light path alignment is not required to be carried out every time, and the efficiency of beam combination output is improved.)

1. A laser, comprising:

a laser light outlet;

the first laser head emits a first beam of laser;

the second laser head emits a second beam of laser;

the third laser head sends out a third beam of laser;

a master controller;

the device comprises a first adjusting device and a second adjusting device;

a third adjusting device and a fourth adjusting device;

a 45-degree total reflector is arranged on the first adjusting device, and a 45-degree total reflector is arranged on the third adjusting device so as to generate 90-degree total reflection aiming at the output wavelength of the second laser head; the 45-degree total reflector configured on the second adjusting device and the 45-degree total reflector configured on the fourth adjusting device generate 90-degree total reflection aiming at the output wavelength of the third laser head;

first adjusting device, set up in first laser head with between the second adjusting device, include: a first motor, a first rotating disk; the first rotating disc comprises a 45-degree total reflection mirror of a first adjusting device and a light through hole of the first adjusting device; the rotating center of the first rotating disc is arranged on an output rotating shaft of a first motor, the first motor is controlled by the main controller, and under the action of a driving signal of the main controller, the positions of a 45-degree total reflector of a first adjusting device of the first rotating disc and a light-passing hole of the first adjusting device are adjusted through the rotation of the first motor, so that a first laser beam can pass through the light-passing hole of the first adjusting device, or a second laser beam can be reflected by the 45-degree total reflector of the first adjusting device for 90 degrees;

the second adjusting device is arranged between the first adjusting device and the light outlet, and comprises: a second motor, a second rotating disk; the second rotating disk comprises a 45-degree total reflection mirror of a second adjusting device and a light through hole of the second adjusting device; the rotating center of the second rotating disk is arranged on an output rotating shaft of a second motor; the second motor is controlled by the master controller, and under the action of a driving signal of the master controller, the positions of a 45-degree total reflection mirror of a second adjusting device of the second rotating disc and a light through hole of the second adjusting device are adjusted through the rotation of the second motor, so that a first laser beam can pass through the light through hole of the second adjusting device, or a second laser beam reflected by the 45-degree total reflection mirror of the first adjusting device at 90 degrees can pass through the light through hole of the second adjusting device, or a third laser beam can be reflected by the 45-degree total reflection mirror of the second adjusting device at 90 degrees;

the third adjusting device is used for receiving the second laser beam and reflecting the second laser beam to the 45-degree total reflector of the first adjusting device through the 45-degree total reflector of the third adjusting device;

and the fourth adjusting device is used for receiving the third laser beam and reflecting the third laser beam to the 45-degree total reflector of the second adjusting device through the 45-degree total reflector of the fourth adjusting device.

2. The laser according to claim 1, characterized in that the first rotating disk is provided with: the device comprises a motor rotating shaft fixing hole, a first light through hole, a second light through hole and a 45-degree total reflector;

the motor rotating shaft fixing hole is connected with a rotating shaft of the first motor, and the first light through hole, the second light through hole and the 45-degree total reflection mirror are uniformly distributed along the motor rotating shaft fixing hole and achieve dynamic balance;

the second adjusting device is identical to the first adjusting device in structure.

3. The laser according to claim 1, characterized in that said third and fourth adjusting means are both fixed adjusting means, on which a 45 ° total reflection mirror is mounted.

4. The laser device as claimed in any one of claims 1 to 3, wherein each laser head is a pulse laser which outputs the same wavelength and the same output parameter by using the same working substance, or a pulse laser which outputs the same wavelength by using different working substances or outputs the same wavelength but other output parameters by using the same working substance.

5. The laser device as claimed in claim 2, wherein the first adjusting device further comprises a positioning device, the positioning device comprises a groove-shaped optical coupler fixed on the adjusting device, and a shielding sheet arranged on the first rotating disk;

the shielding piece moves along with the first rotating disk and shields a light signal light path transmitted from a light emitting end of the optical coupler to a receiving end in a short time when the groove-shaped optical coupler is scratched, so that the groove-shaped optical coupler generates an electric signal, the receiving end of the groove-shaped optical coupler provides the signal for the main controller, and position signals of No. 1, a second light through hole and a 45-degree total reflector on the first rotating disk are provided.

6. The laser of claim 5 wherein the first, second and third laser heads are arranged in parallel.

7. The laser according to claim 1 or 6, characterized in that the second laser head, the third laser head are also arranged parallel and perpendicular to the first laser head.

Technical Field

The invention relates to the technical field of light-emitting time-sharing beam combination of multi-path laser heads, in particular to a laser in a pulse working state.

Background

With the development of the application of lasers in various fields such as laser processing, laser medical treatment and the like, people often select lasers with different working substances to output specific wavelengths and different parameters to achieve their purposes, but sometimes the power/energy and repetition frequency output by a single laser cannot well meet the increasing application requirements. For example, for a high-power holmium laser used for medical treatment, because holmium-doped laser working substance (Ho: YAG) has the disadvantages of low thermal conductivity and poor heat dissipation, which limits the holmium-doped laser working substance to generate output with large energy and high repetition frequency, a certain high-power beam combiner is needed to be used for combining a plurality of high-power laser beams into one beam for output (incoherent beam combination).

Disclosure of Invention

The embodiment of the invention aims to provide a laser scheme, which can improve the debugging efficiency of a device to be debugged, reduce the rough action of manually moving the device to be debugged in the debugging process and further reduce the damage probability of the device; and a plurality of laser beams to be debugged can be in a state of being completely output by the same optical path, thereby being more beneficial to subsequent transmission and application. The specific technical scheme is as follows:

to achieve the above object, an embodiment of the present invention provides a laser, including:

a laser light outlet;

the first laser head emits a first beam of laser;

the second laser head emits a second beam of laser;

the third laser head sends out a third beam of laser;

a master controller;

the device comprises a first adjusting device and a second adjusting device;

a third adjusting device and a fourth adjusting device;

a 45-degree total reflector is arranged on the first adjusting device, and a 45-degree total reflector is arranged on the third adjusting device so as to generate 90-degree total reflection aiming at the output wavelength of the second laser head; the 45-degree total reflector configured on the second adjusting device and the 45-degree total reflector configured on the fourth adjusting device generate 90-degree total reflection aiming at the output wavelength of the third laser head;

first adjusting device, set up in first laser head with between the second adjusting device, include: a first motor, a first rotating disk; the first rotating disc comprises a 45-degree total reflection mirror of a first adjusting device and a light through hole of the first adjusting device; the rotating center of the first rotating disc is arranged on an output rotating shaft of a first motor, the first motor is controlled by the main controller, and under the action of a driving signal of the main controller, the positions of a 45-degree total reflector of a first adjusting device of the first rotating disc and a light-passing hole of the first adjusting device are adjusted through the rotation of the first motor, so that a first laser beam can pass through the light-passing hole of the first adjusting device, or a second laser beam can be reflected by the 45-degree total reflector of the first adjusting device for 90 degrees;

the second adjusting device is arranged between the first adjusting device and the light outlet, and comprises: a second motor, a second rotating disk; the second rotating disk comprises a 45-degree total reflection mirror of a second adjusting device and a light through hole of the second adjusting device; the rotating center of the second rotating disk is arranged on an output rotating shaft of a second motor; the second motor is controlled by the master controller, and under the action of a driving signal of the master controller, the positions of a 45-degree total reflection mirror of a second adjusting device of the second rotating disc and a light through hole of the second adjusting device are adjusted through the rotation of the second motor, so that a first laser beam can pass through the light through hole of the second adjusting device, or a second laser beam reflected by the 45-degree total reflection mirror of the first adjusting device at 90 degrees can pass through the light through hole of the second adjusting device, or a third laser beam can be reflected by the 45-degree total reflection mirror of the second adjusting device at 90 degrees;

the third adjusting device is used for receiving the second laser beam and reflecting the second laser beam to the 45-degree total reflector of the first adjusting device through the 45-degree total reflector of the third adjusting device;

and the fourth adjusting device is used for receiving the third laser beam and reflecting the third laser beam to the 45-degree total reflector of the second adjusting device through the 45-degree total reflector of the fourth adjusting device.

In one implementation the first rotary disk is provided with: the device comprises a motor rotating shaft fixing hole, a first light through hole, a second light through hole and a 45-degree total reflector;

the motor rotating shaft fixing hole is connected with a rotating shaft of the first motor, and the first light through hole, the second light through hole and the 45-degree total reflection mirror are uniformly distributed along the motor rotating shaft fixing hole and achieve dynamic balance;

the second adjusting device is identical to the first adjusting device in structure.

In one implementation, the third adjusting device and the fourth adjusting device are both fixed adjusting devices, and 45 ° total reflection mirrors are mounted on the fixed adjusting devices.

In one implementation, each laser head is a pulse laser that outputs the same wavelength and the same output parameter by using the same working substance, or a pulse laser that outputs different wavelengths by using different working substances, or outputs the same wavelength by using the same working substance but has different other output parameters.

In one implementation, the 45 ° total reflection mirrors configured on the first adjusting device and the third adjusting device need to generate 90 ° total reflection for the output wavelength of the second laser head; the 45-degree total reflection mirrors arranged on the second and fourth adjusting devices need to generate 90-degree total reflection aiming at the output wavelength of the third laser head.

In one implementation mode, the first adjusting device further comprises a positioning device, and the positioning device comprises a groove-shaped optocoupler fixed on the adjusting device and a shielding piece arranged on the first rotating disk;

the shielding piece moves along with the first rotating disk and shields a light signal light path transmitted from a light emitting end of the optical coupler to a receiving end in a short time when the groove-shaped optical coupler is scratched, so that the groove-shaped optical coupler generates an electric signal, the receiving end of the groove-shaped optical coupler provides the signal for the main controller, and position signals of No. 1, a second light through hole and a 45-degree total reflector on the first rotating disk are provided.

In one implementation, the first laser head, the second laser head and the third laser head are arranged in parallel.

In one implementation, the second laser head and the third laser head can be arranged in parallel and perpendicular to the first laser head.

By applying the laser provided by the embodiment of the invention, three laser heads are placed in parallel, and three parallel laser beams are emitted in turn. When the first laser head works and emits a first laser beam, the first adjusting device and the second adjusting device are both positioned at the positions of the light through holes under the control of the main controller, so that the first laser beam passes through the light through holes of the first adjusting device and the second adjusting device and reaches the light outlet of the laser; when the second laser head works and emits a second laser beam, the first adjusting device is positioned at the position of the 45-degree total reflector and the second adjusting device is positioned at the position of the light through hole under the control of the main controller, at the moment, the second laser beam is reflected for 90 degrees by the 45-degree total reflector of the third adjusting device and then reflected for 90 degrees again by the 45-degree total reflector of the first adjusting device, and passes through the light through hole of the second adjusting device along the same light path as the first laser beam to reach the light outlet of the laser; when the third laser head works and emits a third laser beam, the second adjusting device is positioned at the position of the 45-degree total reflector (without considering the position of the first adjusting device), and the third laser beam is reflected by the 45-degree total reflector of the fourth adjusting device and then reflected by the 45-degree total reflector of the second adjusting device for 90 degrees once again, so that the third laser beam reaches the light outlet of the laser along the same light path as the first laser beam and the second laser beam. In the process, as long as the light-emitting time interval of each laser head is reasonably set, the three laser beams can be combined and output by rotating and adjusting the motor through the main controller. Therefore, three laser heads can emit laser in turn and converge to the main light path along respective paths to form a beam of laser output, and light path alignment adjustment is not required to be carried out every time; the efficiency of beam combination output is improved, and the overall laser working frequency is also directly improved by three times, for example, the working frequency of each laser head is 10Hz, and the working frequency of the whole laser reaches 30 Hz.

Drawings

FIG. 1 is a schematic diagram of a main structure of a laser provided by the present invention;

FIG. 2 is a schematic view of a rotary disk structure of the first and second adjusting devices of the laser provided by the present invention;

FIG. 3 is a schematic diagram of the operation of the 45 DEG total reflection mirror of the first, second, third and fourth adjusting devices of the laser provided by the present invention;

FIG. 4 is a schematic diagram of a laser according to the present invention;

FIG. 5 is a schematic diagram of the working timing sequence of the rotating disk of the first and second adjusting devices of the laser provided by the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1-5 are schematic diagrams of the laser structure of the present invention.

Specifically, a laser includes: a laser light outlet 13; a first laser head 10 emitting a first beam of laser light; a second laser head 11 for emitting a second laser beam; and a third laser head 12 for emitting a third laser beam.

It will be appreciated that each laser head can be used either individually or in a multiplexed manner.

The laser also comprises a main controller which can be realized by a singlechip, and the laser is communicated with a laser power supply (not shown in the figure), a first adjusting device 1 and a second adjusting device 2 through the singlechip to realize the combined beam output of at least three paths of lasers.

In the embodiment of the invention, the laser system communicates with the first adjusting device 1 and the second adjusting device 2 through the master controller. The first adjusting device 1, as shown in fig. 1 and 2, includes a main body including: a first motor 101, a first rotating disk 102. The first rotating disc 102 is provided with a motor rotating shaft fixing hole 121 positioned at the geometric center of the first rotating disc, and a No. 1 light through hole 122, a No. 2 light through hole 123 and a 45-degree total reflection mirror 124 which are arranged on the first rotating disc 102; the first motor 101 is controlled by the main controller, the first rotating disc 102 is connected with the rotating shaft of the first motor 101 through a motor rotating shaft fixing hole 121, the No. 1 light through hole 122, the No. 2 light through hole 123 and the 45-degree total reflection mirror 124 are uniformly distributed along the motor rotating shaft fixing hole 121, and a balance weight is added at a proper position.

It should be noted that, as shown in fig. 3 and 4, the first motor 101 is a servo motor, the rotating disk is fixed on the rotating shaft of the motor through a rotating shaft fixing hole 121 located in the center of the rotating disk 102, and the rotating disk changes its position when the motor rotates, so that the light passing hole No. 1 122, the light passing hole No. 2 123, and the 45 ° total reflection mirror 124 on the rotating disk appear in the light path in turn, and the light path is switched by switching to the light passing hole or the 45 ° total reflection mirror on the light path to change the propagation mode of the light, thereby achieving the switching adjustment of the light path.

It should be noted that, when the first laser head is ready to emit laser light, it is necessary to ensure that the light path corresponding to the laser light is clear in advance. Because the final beam combining light outlet is fixedly arranged and corresponds to the output direction of the first laser head, the first laser head can be ensured to directly output the first beam of laser to the light outlet as long as the first laser head is not blocked from the light outlet.

Specifically, when the master controller communicates with the first motor 101 and the driving motor rotates, at the same time when the first beam of laser emits light, the No. 1 light-passing hole 122 or the No. 2 light-passing hole 123 of the first adjusting device 1 is placed on the light path (at this time, the geometric center of the hole is located on the optical axis of the light path), so that the first beam of laser passes through the light-passing hole of the first adjusting device 1; or at the time of the second laser beam emitting light, the 45 ° total reflection mirror 124 of the first adjusting device 1 is placed in the optical path, so that the second laser beam is reflected by the 45 ° total reflection mirror of the first adjusting device 1 for 90 °, and advances along the same optical path as the first laser beam.

The second adjusting device 2 has the same structure as the first adjusting device 1, and under the action of a main controller driving signal, the positions of the light through hole and the 45-degree total reflection mirror on the second adjusting device 2 are adjusted through the rotation of the second motor, so that the first laser beam and the second laser beam can alternately pass through the light through hole of the second adjusting device 2 (each laser beam passes through the corresponding light through hole), or the third laser beam is reflected by 90 degrees through the 45-degree total reflection mirror of the second adjusting device 2 and advances along the same light path as the first laser beam and the second laser beam.

The third adjusting device 3 is provided with a 45-degree total reflection mirror, receives the second laser beam and reflects the second laser beam to the 45-degree total reflection mirror 124 of the first adjusting device 1; the fourth adjusting device 4 has the same structure and function as the third adjusting device 3, and receives the third laser beam and reflects the third laser beam to the 45-degree total reflection mirror of the second adjusting device 2. As shown in fig. 3 and 4.

In the embodiment of the invention, in order to enable the second beam of laser and the third beam of laser to pass through the respective corresponding adjusting devices to realize the output of the second beam of laser and the third beam of laser in the same optical path as the first beam of laser, the pitch angles and the azimuth angles of all four adjusting devices are required to be finely adjusted.

The master controller controls the laser power supply to be alternately threeThe laser head provides discharge current of the pulse xenon lamp to achieve the purpose of improving the laser repetition frequency. Note that, because the speed of light in air is approximately equal to the speed of light in vacuum (3X 10)⁸Meter/second), the time difference corresponding to the optical path difference brought by the structure (with the interval of about 100-200 mm) in which the three laser heads are completely placed in parallel as shown in fig. 1 is only less than 0.5ns, and the total repetition rate of the laser is not more than 200Hz, that is, the interval between two adjacent laser pulses respectively emitted by different laser heads is not less than 5ms, which can be completely ignored, so that the optical path difference of the three laser heads does not need to be adjusted.

TABLE 1 position of two rotary adjusting devices at the time of firing of each laser head

When the laser works in a long pulse state, according to a laser working frequency meter of 200Hz, under the condition that the first adjusting device and the second adjusting device rotate at constant speed, the time that a laser spot completely passes through the light through hole without being shielded is calculated to be 1.9ms, and a certain redundancy is considered, so that the pulse with the laser pulse width of 1.5ms can pass through the light through hole without being shielded or can be subjected to 90-degree total reflection by a 45-degree total reflector. In other words, as long as the pulse width of the laser is not more than 1.5ms and the total working frequency is not more than 200Hz, the two rotary adjusting devices can be driven by the cheap adjustable-speed motor.

For applications beyond the above-defined parameters, a servo motor is used instead of the above-described inexpensive adjustable speed motor. Under the matching of the groove-shaped optical coupler,the servo motor drives the rotating disc to work in an intermittent manner, that is, at the interval of laser pulses, the motor drives the rotating disc to rapidly rotate 120 degrees from one position (a light through hole or a 45-degree total reflection mirror) to the next position (the light through hole or the 45-degree total reflection mirror) and stay for a period of time, see fig. 5, so that three working positions (such as the light through hole 122, the 45-degree total reflection mirror 124 and the light through hole 123 of the first adjusting device 1, where the rotating disc is set to rotate clockwise, which is the same throughout) of the rotating disc can obtain a larger duty ratio in time. In particular, the time period distribution of the rotation and pause of the servo motor is determined by parameters of laser pulse width and total working frequency of a laser, and the product of the laser pulse width and the total working frequency can not be close to 1 in principle, generally is about 0.5-0.6 at most, otherwise, an arc connecting fault easily occurs in a laser power supply. (e.g., 1ms pulse width laser, total operating frequency 1000Hz, 1ms 1X 10^-3s, 1000Hz is 1 × 10³s^-1The product is exactly 1)

As for the laser working in free oscillation (typical pulse width is 200-300 mus), Q switch (typical pulse width is not more than 10ns) and mode locking (typical pulse width is hundreds of ps to tens of fs), because relative to the time allowed by the light spot passing through the light through hole (or 90 DEG total reflection through the 45 DEG total reflection mirror), the duration of the laser is a micro value, the laser can completely adopt the speed-adjustable motor rotating at constant speed to drive the rotating disc to work without worrying about the problem of incomplete output light spot.

It should be noted that the slot type optical coupler has a good isolation effect on input and output signals, and has good anti-interference capability and electrical insulation capability. Therefore, the groove-shaped optical coupler is used as an isolation element of the terminal, and the signal to noise ratio can be well improved. The groove type optocoupler is composed of an infrared transmitting tube and an infrared receiving tube, and comprises four pins in total, and two transmitting ends and two receiving ends are arranged. Two pins of the transmitting end are electrified to transmit infrared rays, and when the receiving end receives the infrared rays, the output is high level, and the motor rotates. The lens on the lens bracket rotates along with the motor, when the lens is just in between the U-shaped grooves, signals of the infrared receiving end are blocked, then the receiving end outputs low level, the servo motor stops rotating, and the initial phase is determined. The method controls the initial position of the rotary mirror bracket, and is high in efficiency and good in accuracy.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.