Optical transmitter, photonic detector and passive optical network system

Abstract

The present application provides an optical transmitter, which includes a tunable laser, a photonic detector and a regulator module which is coupled between the tunable laser and the photonic detector, wherein, a part of the output light of the tunable laser is provided to the photonic detector as detection light. the photonic detector includes: a semiconductor substrate, a photoelectric detection Positive Intrinsic-Negative (PIN) structure, which is located on the semiconductor substrate, an integrated Fabry-Perot (FP) cavity, which includes two reflect planes set on two opposite surfaces of the semiconductor substrate, wherein, the thickness of the semiconductor substrate is used as the cavity length of the integrated FP cavity, and the thickness of the semiconductor substrate makes the transmission peak of the integrated FP locate at a preset target wavelength. The present application further provides a photonic detector and a passive optical network system.

Description

technical field [0001] The present application mainly relates to optical communication technology, in particular, to an optical transmitter with a wavelength locking function; the present application also relates to a photodetector (Photonic Detector, PD) applicable to the optical transmitter and a A passive optical network system using the optical transmitter can be used. Background technique [0002] As users' demand for bandwidth continues to grow, traditional copper broadband access systems are increasingly facing bandwidth bottlenecks. At the same time, the optical fiber communication technology with huge bandwidth capacity is becoming more and more mature and the application cost is decreasing year by year. Optical fiber access network, such as Passive Optical Network (PON), has gradually become a strong competitor of the next generation broadband access network. At present, among many optical fiber access network solutions, the WDM PON system based on Wavelength Divi...

AI Technical Summary

Problems solved by technology

However, in the above solution, due to the need to precisely design the grating period, duty cycle and etching depth, the manufacture of the diffraction grating is very difficult, therefore, the cost of manufacturing and packaging of the optical transmitter is very high, and the manufactured The device size is too large to meet the needs of miniaturized packaging

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