Monolithically integrated multiplexer transceiver based on etched diffraction grating

Abstract

The invention discloses a monolithically integrated multiplexer transceiver based on an etched diffraction grating, which mainly consists of an etched diffraction grating, an input and output waveguide, a gain waveguide and two multimode waveguide detectors. A downlink optical signal entering through the input and output waveguide is coupled to the two multimode waveguide detectors through the etched diffraction grating. The etched diffraction grating reflects one part of light emitted from the front head face of the gain waveguide back to the gain waveguide through a certain order of diffraction, and forms a resonant laser cavity for generating an uplink optical signal with the rear reflection head face of the gain waveguide. The etched diffraction grating reflects the other part of lightto the input and output waveguide through another order of diffraction at the same time to be further coupled in the optical fiber as the uplink optical signal for transmission. The invention truly realizes the monolithic integration, decreases the coupled times with the optical fiber, reduces the size, improves the integration and is applicable to the mass production.

Description

technical field [0001] The invention relates to a single-fiber multi-directional transceiver, in particular to an integrated single-fiber two-way and single-fiber three-way transceiver for fiber-to-the-home. Background technique [0002] With the emergence of high-bandwidth services such as video-on-demand, online games, and IPTV, users' demand for access bandwidth will further increase. capacity and security requirements. FTTH (fiber-to-the-home), as a final form of optical fiber access network development, can give full play to the huge potential of the optical fiber network and completely solve the bandwidth problem of user access. [0003] In FTTH application, mainly adopt two kinds of technologies. One is point-to-point optical access technology (P2P technology), and the other is point-to-multipoint PON technology (passive optical network technology), see figure 1 . Among them, PON technology is recognized by the industry as the best solution to realize FTTH. It ca...

AI Technical Summary

Problems solved by technology

In this device, the uplink 1310nm optical signal transmitter, that is, the laser needs to be placed on the chip by flip-chip (Flip-Chip) and other technologies, which increases the difficulty of packaging and increases the system cost.

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