阅读说明：本技术 光通信用光波长测量系统 (Optical wavelength measurement system for optical communication ) 是由 胡海洋 金镖 黄建军 廉哲 于 2021-08-16 设计创作，主要内容包括：本发明公开一种光通信用光波长测量系统,包括：位于壳体内的光输入端口、遮光罩、离轴抛物面反射镜、第一平板玻璃、第二平板玻璃、至少2个柱透镜和至少2个线性光电探测器,所述第一平板玻璃与第二平板玻璃之间设置有一中央具有镂空区且带有楔角的隔离框,从而形成一密封腔；所述第一平板玻璃的前表面一侧设置有至少一个厚度且位于密封腔内的小平板玻璃；一光路切换器一端与光输入端口连接。本发明光通信用光波长测量系统在不增加光路尺寸的同时,检测的光谱范围宽且能同时对多种波长类型的光波长光精确测量,达到了pm级测量精度。(The invention discloses an optical wavelength measuring system for optical communication, comprising: the optical fiber laser comprises a light input port, a light shield, an off-axis parabolic reflector, a first flat glass, a second flat glass, at least 2 cylindrical lenses and at least 2 linear photodetectors, wherein a separation frame which is provided with a hollow area at the center and a wedge angle is arranged between the first flat glass and the second flat glass, so that a sealed cavity is formed; at least one small flat glass with the thickness and positioned in the sealing cavity is arranged on one side of the front surface of the first flat glass; one end of an optical path switcher is connected with the optical input port. The optical wavelength measuring system for optical communication has the advantages that the optical path size is not increased, the detected spectral range is wide, the optical wavelength light of various wavelength types can be accurately measured at the same time, and the pm-level measuring precision is achieved.)

1. An optical wavelength measurement system for optical communication, characterized in that: the method comprises the following steps: the optical fiber connector comprises a light input port (1), a light shield (2), an off-axis parabolic reflector (3), a first flat glass (4), a second flat glass (5), at least 2 cylindrical lenses (6) and at least 2 linear photodetectors (7) which are positioned in a shell (11), wherein a separation frame (8) which is provided with a hollow area at the center and is provided with a wedge angle is arranged between the first flat glass (4) and the second flat glass (5) so as to form a sealed cavity, and the front surface of the first flat glass (4) is arranged opposite to the rear surface of the second flat glass (5);

at least one small flat glass (9) with the thickness and located in the sealed cavity is arranged on one side of the front surface of the first flat glass (4), a first reflecting layer (101) is arranged on the other side of the front surface of the first flat glass, the thickness of the small flat glass (9) is smaller than that of the isolation frame (8), a second reflecting layer (102) is arranged on the rear surface of the second flat glass (5), a third reflecting layer (103) is arranged on the surface, opposite to the second flat glass (5), of the small flat glass (9), the light input port (1) and the first flat glass (4) are located on the same side of the off-axis parabolic reflector (3), and light from the light input port (1) is reflected to the surface of the first flat glass (4) through the off-axis parabolic reflector (3);

the light shield (2) is arranged between the off-axis parabolic reflector (3) and the first plate glass (4) or between the second plate glass (5) and at least 2 linear photoelectric detectors (7); one end of a light path switcher (14) is connected with the optical input port (1), a first input end at the other end of the light path switcher (14) is connected with the single-wavelength light source (15), and a second input end at the other end of the light path switcher (14) is used for being connected with the light source interface (12) to be detected.

2. The optical wavelength measurement system for optical communication according to claim 1, wherein: the number of the small flat glass (9) is 2, wherein the thickness of one small flat glass (9) is larger than that of the other small flat glass (9).

3. The optical wavelength measurement system for optical communication according to claim 1, wherein: the reflectivity of the first reflecting layer (101), the second reflecting layer (102) and the third reflecting layer (103) is more than 30%, and the transmissivity is more than 50%.

4. The optical wavelength measurement system for optical communication according to claim 1, wherein: the optical input port (1) is an optical fiber input port.

5. The optical wavelength measurement system for optical communication according to claim 1, wherein: the surface of the shell (11) is coated with a heat insulation layer (13).

Technical Field

The invention relates to an optical wavelength measuring system for optical communication, and belongs to the technical field of optical wavelength detection.

Background

Techniques for achieving optical wavelength measurements in the optical domain include spectrometers and interferometers. The measurement precision of the spectrometer can reach about 0.02nm and the measurement precision of the interferometer can reach pm level or even smaller under the limitation of a measurement principle.

The existing interferometer for wavelength measurement adopts a reflection-type optical path, and the interference etalon is formed by bonding two pieces of flat glass and a spacer ring with a wedge angle by using an optical cement. The reflectivity of two plate glass-air interfaces is only about 4%, and the interference pattern obtained by the interference of two light beams generated by the reflected light beams of the two interfaces is a sine fringe with equal period. On one hand, in the prior art, an interferometer with a transmission light path is adopted, wherein an interference etalon is formed by bonding two pieces of plate glass and a space ring with a wedge angle by using optical cement, and different from the early research, a reflection film layer with larger reflectivity (reflectivity > 50%) to light waves is plated on the plate glass, light beams are reflected back and forth for multiple times between the reflection film layers so as to generate multi-beam interference of emergent light, and finally, a peak with higher brightness and sharper brightness than sinusoidal fringes is obtained.

On the other hand, the existing interference etalon is limited by factors such as transverse size, the number of pixels of the linear array photoelectric detector, signal noise, calculation accuracy and the like, and the pm-level and higher measurement accuracy is difficult to realize in a wide spectral range (hundreds of nanometers) by adopting one interference etalon. In order to solve the contradiction between the wide measurement range and the high measurement precision, it is important to develop an optical wavelength measurement device with a wide detection spectral range and high measurement precision for the development of the optical field.

Disclosure of Invention

The invention aims to provide an optical wavelength measuring system for optical communication, which has a wide detected spectral range and can accurately measure optical wavelength lights of various wavelength types simultaneously without increasing the size of an optical path, thereby achieving pm-level measurement accuracy and reducing the cost.

In order to achieve the purpose, the invention adopts the technical scheme that: an optical wavelength measurement system for optical communication, comprising: the optical fiber laser comprises a light input port, a light shield, an off-axis parabolic reflector, a first flat glass, a second flat glass, at least 2 cylindrical lenses and at least 2 linear photodetectors, wherein an isolation frame which is provided with a hollow area at the center and a wedge angle is arranged between the first flat glass and the second flat glass, so that a sealed cavity is formed, and the front surface of the first flat glass and the rear surface of the second flat glass are oppositely arranged;

at least one small flat glass with the thickness and positioned in the sealing cavity is arranged on one side of the front surface of the first flat glass, a first reflecting layer is arranged on the other side of the front surface of the first flat glass, the thickness of the small flat glass is smaller than that of the isolation frame, a second reflecting layer is arranged on the rear surface of the second flat glass, a third reflecting layer is arranged on the surface, opposite to the second flat glass, of the small flat glass, the light input port and the first flat glass are positioned on the same side of the off-axis parabolic reflector, and light from the light input port is reflected to the surface of the first flat glass through the off-axis parabolic reflector;

the light shield is arranged between the off-axis parabolic reflector and the first flat glass or between the second flat glass and at least 2 linear photoelectric detectors; one end of a light path switcher is connected with the optical input port, a first input end at the other end of the light path switcher is connected with the single-wavelength light source, and a second input end at the other end of the light path switcher is used for being connected with a light source interface to be detected.

The further improved scheme in the technical scheme is as follows:

1. in the scheme, the number of the small flat glass plates is 2, wherein the thickness of one small flat glass plate is larger than that of the other small flat glass plate.

2. In the above scheme, the reflectance of the first reflective layer, the second reflective layer and the third reflective layer is greater than 30%, and the transmittance is greater than 50%.

3. In the above scheme, the optical input port is an optical fiber input port.

4. In the above scheme, the surface of the shell is coated with a heat insulation layer.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the invention relates to an optical wavelength measuring system for optical communication, wherein one side of the front surface of a first flat glass is provided with at least one small flat glass with the thickness and positioned in a sealed cavity, the other side of the front surface of the first flat glass is provided with a first reflecting layer, the thickness of the small flat glass is smaller than that of an isolation frame, the rear surface of a second flat glass is provided with a second reflecting layer, the surface of the small flat glass, which is opposite to the second flat glass, is provided with a third reflecting layer, an optical input port and the first flat glass are positioned on the same side of an off-axis parabolic reflector, so that light from the optical input port is reflected to the surface of the first flat glass through the off-axis parabolic reflector, the detected spectral range is wide, the accurate measurement of optical wavelength light of various wavelength types can be realized simultaneously without increasing the size of an optical path, the pm-level measurement accuracy is achieved, and the cost is also reduced.

Drawings

FIG. 1 is a schematic structural diagram of an optical wavelength measurement system for optical communication according to the present invention;

FIG. 2 is a schematic view of an optical path of an optical wavelength measurement system for optical communication according to the present invention;

FIG. 3 is a schematic view of a partial optical path of an optical wavelength measurement system for optical communication according to the present invention;

FIG. 4 is an exploded view of example 1 of the present invention;

fig. 5 is an exploded view of embodiment 2 of the present invention.

In the above drawings: 1. an optical input port; 2. a light shield; 3. an off-axis parabolic mirror; 4. a first flat glass plate; 5. a second flat glass plate; 6. a cylindrical lens; 7. a linear photodetector; 8. an isolation frame; 9. small flat glass; 101. a first reflective layer; 102. a second reflective layer; 103. a third reflective layer; 11. a housing; 12. a light source interface to be detected; 13. a thermal insulation layer; 14. an optical path switcher; 15. a single wavelength light source.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: an optical wavelength measurement system for optical communication, comprising: the optical fiber laser comprises a light input port 1, a light shield 2, an off-axis parabolic reflector 3, a first flat glass 4, a second flat glass 5, 2 cylindrical lenses 6 and 2 linear photodetectors 7 which are positioned in a shell 11, wherein a separation frame 8 which is provided with a hollow area at the center and a wedge angle is arranged between the first flat glass 4 and the second flat glass 5, so that a sealed cavity is formed, and the front surface of the first flat glass 4 is opposite to the rear surface of the second flat glass 5;

a small flat glass 9 with a thickness and located in the sealed cavity is arranged on one side of the front surface of the first flat glass 4, a first reflecting layer 101 is arranged on the other side of the front surface, the thickness of the small flat glass 9 is smaller than that of the isolation frame 8, a second reflecting layer 102 is arranged on the rear surface of the second flat glass 5, a third reflecting layer 103 is arranged on the surface of the small flat glass 9 opposite to the second flat glass 5, the light input port 1 and the first flat glass 4 are located on the same side of the off-axis parabolic reflector 3, and light from the light input port 1 is reflected to the surface of the first flat glass 4 through the off-axis parabolic reflector 3;

the light shield 2 is arranged between the off-axis parabolic reflector 3 and the first plate glass 4 or between the second plate glass 5 and at least 2 linear photodetectors 7; one end of an optical path switch 14 is connected to the optical input port 1, a first input end at the other end of the optical path switch 14 is connected to the single-wavelength light source 15, and a second input end at the other end of the optical path switch 14 is used for being connected to the light source interface 12 to be detected.

The reflectivity of the first reflective layer 101, the second reflective layer 102 and the third reflective layer 103 is greater than 30%, and the transmissivity is greater than 50%.

The optical input port 1 is an optical fiber input port.

The surface of the shell 11 is coated with a heat insulation layer 13.

Example 2: an optical wavelength measurement system for optical communication, comprising: the optical fiber laser comprises a light input port 1, a light shield 2, an off-axis parabolic reflector 3, a first flat glass 4, a second flat glass 5, 2 cylindrical lenses 6 and 2 linear photodetectors 7 which are positioned in a shell 11, wherein a separation frame 8 which is provided with a hollow area at the center and a wedge angle is arranged between the first flat glass 4 and the second flat glass 5, so that a sealed cavity is formed, and the front surface of the first flat glass 4 is opposite to the rear surface of the second flat glass 5;

two small flat glasses 9 with the thickness and located in the sealed cavity are arranged on one side of the front surface of the first flat glass 4, a first reflecting layer 101 is arranged on the other side of the front surface, the thickness of each small flat glass 9 is smaller than that of the isolation frame 8, the thickness of one small flat glass 9 is larger than that of the other small flat glass 9, a second reflecting layer 102 is arranged on the rear surface of the second flat glass 5, a third reflecting layer 103 is arranged on the surface, opposite to the second flat glass 5, of each small flat glass 9, the light input port 1 and the first flat glass 4 are located on the same side of the off-axis parabolic reflector 3, and light from the light input port 1 is reflected to the surface of the first flat glass 4 through the off-axis parabolic reflector 3;

the light shield 2 is arranged between the off-axis parabolic reflector 3 and the first plate glass 4 or between the second plate glass 5 and at least 2 linear photodetectors 7; one end of an optical path switch 14 is connected to the optical input port 1, a first input end at the other end of the optical path switch 14 is connected to the single-wavelength light source 15, and a second input end at the other end of the optical path switch 14 is used for being connected to the light source interface 12 to be detected.

When the optical wavelength measuring system for optical communication is adopted, one side of the front surface of the first flat glass is provided with at least one small flat glass with the thickness and positioned in the sealing cavity, the other side of the front surface is provided with a first reflecting layer, the thickness of the small flat glass is smaller than that of the isolation frame, the rear surface of the second flat glass is provided with a second reflecting layer, the opposite surfaces of the small flat glass and the second flat glass are provided with third reflecting layers, the optical input port and the first flat glass are positioned at the same side of the off-axis parabolic reflector, so that light from the optical input port is reflected to the surface of the first flat glass through the off-axis parabolic reflector, the detected spectral range is wide, the accurate measurement of optical wavelength light of various wavelength types can be realized simultaneously without increasing the size of an optical path, the pm-level measurement accuracy is achieved, and the cost is also reduced.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.