Hybrid integrated tunable outer cavity laser device and wavelength tuning method

Abstract

The embodiment of the invention provides a hybrid integrated tunable outer cavity laser device and a wavelength tuning method. The laser device comprises an outer cavity and an output assembly, wherein the outer cavity comprises a reflection type semiconductor gain chip, a first collimation lens, a controlled optical grid filter, a converging lens and a semiconductor integrated chip, wherein a high-reflection film and an anti-reflection film are plated on two end faces of the reflection type semiconductor gain chip respectively; the first collimation lens, the controlled optical grid filter, the converging lens and the semiconductor integrated chip are arranged on the end face plated with the anti-reflection film of the reflection type semiconductor gain chip in sequence along a light path; a phase modulation region, a sampling optical grid region and a gain active region are integrated on the semiconductor gain chip, and are used for carrying out outer cavity phase modulation and control, cavity mode selective filtering and light power control respectively; the output assembly is arranged at a laser output side of the outer cavity and is used for outputting laser transmitted fromthe gain active region. The laser device is compact in structure, small in volume, small in coupling loss and relatively high in integration degree.

Description

technical field [0001] Embodiments of the present invention relate to the field of lasers, in particular to a hybrid integrated tunable external cavity laser and a wavelength tuning method. Background technique [0002] With the rapid development of various mobile data services and large-capacity leased line services, network bandwidth and capacity requirements are experiencing explosive growth. Digital coherent optical communication technology can provide larger bandwidth, longer transmission distance and higher receiving sensitivity, and has gradually become an inevitable choice for ultra-large capacity, ultra-long transmission distance and high-speed optical network. As a high-coherence optical signal source and local oscillator, high-performance tunable lasers are indispensable in high-speed digital coherent communication systems. The latest report shows that the global market for tunable lasers will continue to grow in the next few years, and the global demand can reac...

AI Technical Summary

Problems solved by technology

Commercial products have been successfully used in high-speed multi-channel coherent communication systems, but traditional external-cavity lasers are large in size, unfavorable for miniaturization, and poor in stability, and are prone to mode hopping caused by interference from various external factors, thus Causes the characteristics of the laser to deteriorate

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