Semiconductor Lasers for Optical Fiber Communications

Abstract

The invention discloses a semiconductor laser for optical fiber communication, comprising: a transmitting end, an optical fiber and a receiving end, the transmitting end includes a semiconductor laser line array, and a first emitting end collimator lens, a first emitting end arranged in sequence along the optical path Diffraction grating at the end and a collimating lens at the second transmitting end; the optical fiber has a first end face and a second end face; the receiving end receives the laser beam from the second end face of the optical fiber, including receiving end collimators arranged in sequence along the optical path A lens, a receiving end diffraction grating, a focus conversion lens and a receiving photoconductor line array. The semiconductor laser of the present invention uses an external cavity to feed back the semiconductor laser line array, locks the semiconductor laser wavelengths in the multi-point line array at the same time, and then generates multi-wavelength semiconductor laser beams through spectrum combining.

Description

【Technical field】 [0001] The invention relates to the field of semiconductor laser communication, in particular to a semiconductor laser used for optical fiber communication. 【Background technique】 [0002] Optical fiber communication has been widely used in various industries in today's society. Optical fiber communication is characterized by its high capacity, among which wavelength multiplexing is a manifestation of high capacity. The current multi-wavelength light source is usually synthesized by a dichroic dielectric mirror. The adjustment of this method requires high precision, and the wavelength difference is not easy to be made too small. [0003] Therefore, there is also a need for a transmitter module containing multi-wavelength lasers that allows independent modulation and automatic beam combining, so as to more conveniently realize multi-wavelength optical fiber communication. 【Content of invention】 [0004] The present invention aims at at least solving one o...

AI Technical Summary

Problems solved by technology

The current multi-wavelength light source is usually synthesized by a dichroic dielectric mirror. The adjustment of this method requires high precision, and the wavelength difference is not easy to be made too small.

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