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US 2025/0047390 A1Published application
Optical transmitter, optical transceiver using optical transmitter, and wavelength control method
AssigneeFujitsu Limited
InventorsJun MATSUI, Shinsuke TANAKA, Tomoyuki AKIYAMA
Life of this patent
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Abstract
An optical transmitter includes a frequency comb light source; a demultiplexer configured to demultiplex light output from the frequency comb light source into n channels (n is an integer of 2 or greater) at a wavelength interval Δλ; and n filters respectively connected to n output ports of the demultiplexer, the n filters being configured to reduce a high-order spectral component for each wavelength.
Claims11
An optical transmitter comprising:
- a frequency comb light source;
- a demultiplexer configured to demultiplex light output from the frequency comb light source into n channels (n is an integer of 2 or greater) at a wavelength interval Δλ;
- and
- n filters respectively connected to n output ports of the demultiplexer, the n filters being configured to reduce a high-order spectral component for each wavelength.
1 more element
A wavelength control method comprising:
- demultiplexing, by a demultiplexer, light output from a frequency comb light source into n channels (n is an integer of 2 or greater) at a wavelength interval Δλ;
- and
- controlling a filter to bring a peak of a transmission spectrum of the filter close to a wavelength appearing at a corresponding output port of the demultiplexer to reduce a high-order spectral component for each wavelength, the filter being provided to each of n output ports of the demultiplexer.
Dependencies are inferred from the claim text.