Low-crosstalk single-wavelength optical device

Abstract

The invention relates to a low-crosstalk single-wavelength optical device in the technical field of optical fiber communication. The low-crosstalk single-wavelength optical device comprises a BASE base, an inner cavity of the BASE base is coated with black glue, an LD laser and an optical fiber are inserted into the two ends of the inner cavity respectively, a PD photoelectric detector is inserted into the top of the inner cavity, and a light splitting piece and a light absorption piece which are matched with each other are arranged in the inner cavity in a suspended mode through a support; the end face, corresponding to the LD laser, of the optical fiber has an angle, and the high-point direction of the end face of the fixed optical fiber is coupled with the direction of a PD photoelectric detector port; the light splitting piece is arranged at an inclined angle of 45 degrees; the light absorption piece is located under the light splitting piece and inclines by 10 degrees. According to the invention, through the mutual cooperation of the light splitting piece, the light absorption piece and the optical fiber with the inclined end face, the performance of the device is effectively improved, and the crosstalk performance is improved from the traditional crosstalk value of-20dB to-25dB or below; the situation that a traditional single-wavelength optical device is large in crosstalk value is effectively improved, and the problems that the device yield is low and the manufacturing cost is high are effectively solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a single-wavelength optical device with low crosstalk. Background technique [0002] At present, WDM single-fiber bidirectional communication technology has been widely used in the field of optical communication. As the core component of WDM single-fiber bidirectional optical communication---WDM optical transceiver integrated single-fiber bidirectional device also has There are a variety of design schemes, among which the same wavelength wavelength division multiplexing optical transceiver integrated single-fiber bidirectional device is called the one that transmits and receives the same wavelength; this type of device has the disadvantage of large crosstalk, and the stray light at the transmitting end and the light at the transmitting end pass through the optical fiber The emission from the end face of the ceramic end face will enter the detector, forming cro...

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Problems solved by technology

[0002] At present, WDM single-fiber bidirectional communication technology has been widely used in the field of optical communication. As the core component of WDM single-fiber bidirectional optical communication---WDM optical transceiver integrated single-fiber bidirectional device also has There are a variety of design schemes, among which the one that transmits and receives the same wavelength is called the same wavelength division multiplexing optical transceiver integrated single-fiber bidirectional device; this type of device has the disadvantage of large crosstalk, and the stray light at the transmitting end and the light at the transmitting end pass through the optical fiber The emission from the end face ceramic end face will enter the detector, forming crosstalk and interfering with the normal operation of the detector; most of the existing technologies solve the problem of fiber end face emission by coating the fiber end face with an anti-reflection coating or reduce part of the emission by chamfering the ceramic ferrule, but Neither can effectively solve the problem of stray light entering the detector at the transmitting end, nor can it effectively solve the problem of the light emitted by the ceramic end face entering the detector through reflection

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