A kind of optical single sideband polarization modulation method and device

Abstract

The invention discloses a light single side band polarization modulation method. Microwave signals output by a microwave source are divided into two paths of orthogonal microwave signals, one path of microwave signals are modulated on linear polarization light carrier wave in a polarization module method to generate initial polarization modulation signals, the polarization state of the initial polarization modulation signals are rotated at 45 degrees, and the other path of microwave signals are modulated on the initial polarization modulation signals with the polarization modulation direction rotated in a polarization modulation method to obtain the final light single side band polarization modulation signals. The invention further discloses a light single side band polarization modulation device using the modulation method. The light single side band polarization modulation device comprises a linear polarization light source, a first polarization modulator, a polarization controller, a second polarization modulator, the microwave source and a microwave electric bridge which are sequentially connected in the light path direction. The light single side band polarization modulation method can simultaneously achieve light single side band modulation with complementary phase modulation on two orthogonal polarization states and has the advantages of uncorrelated to wavelength, large in bandwidth, tunable in frequency and the like.

Description

technical field [0001] The invention relates to an optical single sideband modulation method, in particular to an optical single sideband polarization modulation method and device, and belongs to the technical fields of photoelectric modulation and microwave photonics. Background technique [0002] Optical Single Sideband (OSSB) modulation, as an important electro-optical modulation technology, plays an important role in radio over fiber (ROF), high-precision photonic device measurement, wavelength conversion, microwave photonic signal processing and other fields. . Typical optical SSB modulation has optical SSB intensity modulation, that is, an optical notch filter is used to filter out a first-order sideband in the optical SSB intensity modulation signal to obtain an optical SSB intensity modulation signal, and it can also be obtained by using An optical SSB intensity modulator obtains an optical SSB intensity modulated signal. Common optical notch filters mainly include...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the wavelength correlation existing in the existing optical SSB polarization modulation technology, and the problems of limited bandwidth and poor tunability caused by the filter passband slope not being steep enough, and to provide an optical SSB The polarization modulation method and device can not only realize optical single sideband modulation with complementary phase modulation on two orthogonal polarization states simultaneously, but also have the advantages of wavelength irrelevance, wide bandwidth, and frequency tunability.

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