阅读说明：本技术 一种光分插复用器 (Optical add drop multiplexer ) 是由 汪敬 刘磊 于 2017-06-16 设计创作，主要内容包括：一种光分插复用器,涉及光电技术领域,能够使用较大尺寸的布拉格光栅,降低加工难度。光分插复用器包括：下波信号分离器(11)和下波信号反射器(12)；下波信号分离器(11)连接主输入端和下波端；下波信号分离器(11)连接下波信号反射器(12),下波信号反射器(12)连接主输出端。(An optical add-drop multiplexer relates to the technical field of photoelectricity, can use Bragg grating of larger size, reduces the processing degree of difficulty. The optical add/drop multiplexer includes: a down wave signal separator (11) and a down wave signal reflector (12); the lower wave signal separator (11) is connected with the main input end and the lower wave end; the lower wave signal separator (11) is connected with a lower wave signal reflector (12), and the lower wave signal reflector (12) is connected with the main output end.)

An optical add/drop multiplexer, comprising: a down wave signal separator and a down wave signal reflector;

the lower wave signal separator is connected with the main input end and the lower wave end; the lower wave signal separator is connected with the lower wave signal reflector, and the lower wave signal reflector is connected with the main output end; the input end of the lower wave signal separator is used for receiving the optical signal of the first mode and transmitting the optical signal of the first mode to the lower wave signal reflector in a single-layer waveguide transmission mode;

the lower wave signal reflector comprises a first transmission mode converter, a Bragg grating waveguide and a second transmission mode converter;

the first transmission mode converter comprises a first upper layer waveguide and a first lower layer waveguide, wherein the first upper layer waveguide is positioned on the upper layer of the first lower layer waveguide, the first upper layer waveguide and the first lower layer waveguide are connected with the lower wave signal separator, and the first transmission mode converter is used for converting an optical signal of a first mode of a single-layer waveguide transmission mode sent by the lower wave signal separator into a double-layer waveguide transmission mode;

the Bragg grating waveguide comprises a second upper layer waveguide and a second lower layer waveguide, the second upper layer waveguide is positioned on the upper layer of the second lower layer waveguide, and the second lower layer waveguide is connected with the first lower layer waveguide; the width of the second upper layer waveguide is changed periodically according to the first width and the second width alternately to form a Bragg grating; the first width is greater than the second width, the second upper waveguide is connected to the first upper waveguide, and the bragg grating waveguide is configured to receive the optical signal in the first mode sent by the first transmission converter, reflect the optical signal with the predetermined wavelength in the optical signal in the first mode to the first transmission converter as the optical signal in the second mode, and send other optical signals except the optical signal with the predetermined wavelength in the optical signal in the first mode to the second transmission converter;

the second transmission mode converter comprises a third upper layer waveguide and a third lower layer waveguide, wherein the third upper layer waveguide is positioned on the upper layer of the third lower layer waveguide, two ends of the third upper layer waveguide are respectively connected with the second upper layer waveguide and the main output end, and the third lower layer waveguide is connected with the second lower layer waveguide; the second transmission mode converter is used for converting the other optical signals into a single-layer waveguide transmission mode and outputting the single-layer waveguide transmission mode through the main output end;

the first transmission mode converter is further configured to convert the optical signal in the second mode into a single-layer waveguide transmission mode and output the single-layer waveguide transmission mode to the lower wave signal separator, and the lower wave signal separator is further configured to output the optical signal in the second mode through the lower wave end.

An optical add/drop multiplexer according to claim 1, wherein said drop demultiplexer comprises a first waveguide and a second waveguide, wherein an input of said first waveguide and an output of said second waveguide are in the same plane, and wherein an output of said first waveguide and an input of said second waveguide are in the same plane; the width of the first waveguide at the input end is equal to the width of the second waveguide at the output end, the width of the first waveguide linearly increases from the input end to the output end, the width of the second waveguide linearly decreases from the output end to the input end, the output end of the first waveguide is connected with the first upper-layer waveguide and the first lower-layer waveguide, the input end of the first waveguide is used as a main input end of the lower-wave signal separator, and the output end of the second waveguide is used as a lower-wave end of the lower-wave signal separator.

An optical add/drop multiplexer according to claim 2, wherein the width of the input end of said first upper waveguide is equal to the width of the output end of said first waveguide, and the width of said first upper waveguide is equal to said second width;

the width of the input end of the first lower layer waveguide is equal to the width of the output end of the first waveguide, the width of the output end of the first lower layer waveguide is larger than the first width, and the width of the first lower layer waveguide linearly increases from the input end to the output end.

An optical add/drop multiplexer according to claim 1, wherein the thickness of said first upper waveguide is greater than the thickness of said first lower waveguide.

An optical add/drop multiplexer according to claim 1, wherein the width of the input end of said second upper waveguide is equal to said second width, and the width of the output end of said second upper waveguide is equal to said second width;

the width of the input end of the second lower-layer waveguide is equal to the width of the output end of the first lower-layer waveguide, the width of the output end of the second lower-layer waveguide is equal to the width of the output end of the first lower-layer waveguide, and the widths of the second lower-layer waveguides are equal everywhere.

An optical add/drop multiplexer according to claim 1, wherein the thickness of said second upper layer waveguide is greater than the thickness of said second lower layer waveguide.

An optical add/drop multiplexer according to claim 1, wherein the width of the input end of the third upper waveguide is equal to the second width, the width of the third upper waveguide decreasing linearly from the input end to the output end;

the width of the input end of the third lower-layer waveguide is equal to that of the output end of the second lower-layer waveguide, the width of the output end of the third lower-layer waveguide is equal to that of the output end of the third upper-layer waveguide, and the width of the third lower-layer waveguide is linearly reduced from the input end to the output end.

An optical add/drop multiplexer according to claim 1, wherein the thickness of said third upper layer waveguide is greater than the thickness of said third lower layer waveguide.

An optical add/drop multiplexer according to claim 1, wherein the first, second and third upper waveguides are of the same thickness;

the first lower layer waveguide, the second lower layer waveguide and the third lower layer waveguide have the same thickness.

An optical add/drop multiplexer according to claim 1, wherein said first mode is a 0 order mode and said second mode is a 1 order mode; or the first mode is a 1-order mode, and the second mode is a 0-order mode.