A multi-wavelength laser

Abstract

The application discloses a multi-wavelength laser, including a reference wavelength tunable laser, N-1 subordinate wavelength tunable lasers, N beam splitters, a phase modulator and N-1 frequency difference detection devices; the reference wavelength is adjustable The laser is connected to a beam splitter, which includes two output ports, one of which is connected to a phase modulator; the phase modulator is connected to N-1 frequency difference detection devices respectively; N-1 subordinate wavelengths can be The tunable lasers are in one-to-one correspondence with the remaining N-1 beam splitters and N-1 frequency difference detection devices, and the subordinate wavelength-tunable lasers are connected to the corresponding beam splitters, and the corresponding beam splitters include two output ports, One of the output ports is connected to the corresponding frequency difference detection device; N is a positive integer not less than 2. Since the multi-wavelength optical signals generated by the phase modulator have precise frequency intervals, compared with the existing multi-wavelength lasers, the multi-wavelength laser disclosed in this application has higher frequency deviation accuracy.

Description

technical field [0001] The present application relates to the technical field of optical fiber communication, in particular to a multi-wavelength tunable laser. Background technique [0002] At present, the wavelength tunable laser is one of the very important optoelectronic devices in the optical fiber communication system. It can be used not only as the light source at the transmitting end, but also as the local oscillator laser at the coherent receiving end. As people's demand for system transmission capacity continues to increase, the single-wavelength transmission capacity can be increased to 100Gbit / s, 200Gbit / s, or even 400Gbit / s and higher by increasing the baud rate and modulation order of the transmission signal, but The increase of baud rate and modulation order will limit the performance of single-wave large-capacity transmission, resulting in a decrease in transmission distance. Multi-channel parallel transmission can reduce the single-wave rate and increase th...

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Problems solved by technology

[0005] The purpose of this application is to provide a multi-wavelength laser, which solves the problems of low frequency deviation accuracy and limited application scenarios of existing multi-wavelength light sources

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