Large-free-spectrum-range reconfigurable optical frequency comb generation device and implementation method

Abstract

The invention provides a large-free-spectrum-range reconfigurable optical frequency comb generation device and an implementation method. The output port of a laser is connected with the input port ofa single-sideband modulation module; the output port of the single-sideband modulation module is connected with theoutput port of an odd / even-order modulation module, a single-frequency radio frequency signal source is connected with thecommon end of a power divider, one output port of the power divider is connected with the common end of a quadrature coupler, and two output ports of the quadrature coupler are respectively connected with two radio frequency ports of the single-sideband modulation module; and the other output port of the power divider is connected with the input port of a poweramplifier, and the output port of the power amplifier is connected with the radio frequency port of the odd / even order modulation module. Generation of large FSR and reconfigurable six-line or eight-line optical frequency combs is effectively realized, the structure is simple, the power is efficient, and the frequency is tunable so that the system has the capability of generating the six-line andeight-line optical combs at the same time, the number of the comb lines can be tuned through a bias point and the requirements on the frequency and the power of microwave signals are significantly reduced.

Description

technical field [0001] The invention relates to the field of optics, in particular to an optical frequency comb generating device and a realization method. Background technique [0002] Optical frequency combs consist of evenly spaced discrete spectral components, and are widely used in high-capacity optical fiber communications, dense wavelength division multiplexing, and optical arbitrary waveform generation. The traditional multi-carrier light source composed of laser arrays has the disadvantages of difficult synchronization and poor phase coherence because each carrier is generated by an independent laser. Optical frequency comb generation methods based on nonlinear optical effects, such as four-wave mixing and self-phase modulation, are limited by optical effects, and the frequency spacing of the generated optical frequency combs is small, and the power flatness of each comb line is poor and the number of comb lines It is uncontrollable, and has the disadvantages of hi...

AI Technical Summary

Problems solved by technology

At present, various optical frequency comb generation schemes that have been proposed are limited by the generation mechanism and design scheme, and have shortcomings such as poor flatness of the optical comb, small frequency spacing, poor phase coherence, and uncontrollable number of comb lines.

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