SBS broadband tunable optical fiber delay system

Abstract

The invention discloses a broadband tunable optical fiber delay system of stimulated brillouin scattering. The SBS broadband tunable optical fiber delay system comprises a main laser, a first optical coupler, a first tunable optical attenuator, a first optical circulator, a slave laser, an optical amplifier, a second tunable optical attenuator, a second optical circulator, a Mach-Zehnder modulator, an optical fiber Bragg grating and a diffusion shifted fiber, wherein the first optical coupler is used for dividing the laser into first bean of laser and a second beam of laser; the first tunable optical attenuator is used for adjusting the laser power of the first beam of laser; the first optical circulator is used for injecting the first beam of laser into the slave laser; the slave laser is excited by the first beam of laser to produce nonlinear spectral light; the optical amplifier is used for amplifying the power of the pump light; the second optical circulator is used for injecting the pumping light into the diffusion shifted fiber; the Mach-Zehnder modulator, is used for modulating a microwave signal for the second beam of laser; the optical fiber Bragg grating is used for carrying out the phase position modulation for optical signal carrier; the diffusion shifted fiber is delayed under the effect of the stimulated brillouin scattering of the pump light in the propagation process of the diffusion shifted fiber.

Description

technical field [0001] The invention relates to the fields of optical fiber communication and microwave photonics signal processing, in particular to an SBS broadband tunable optical fiber delay system based on optical injection semiconductor laser technology. Background technique [0002] With the development and maturity of dense wavelength division multiplexing technology, erbium-doped fiber amplifier and optical time division multiplexing technology, optical fiber communication technology is developing towards ultra-large capacity, ultra-long-distance communication systems, and gradually evolving to all-optical networks. Optical packet switching based on the concept of "store-and-forward" is a long-term development direction suitable for burst data services in all-optical networks. As an indispensable key device in all-optical routing, fiber delay line (FDL) has the advantages of low loss, large bandwidth, anti-interference, good confidentiality, large dynamic range, and...

AI Technical Summary

Problems solved by technology

[0005] The study found that a wide and flat SBS gain spectrum can be achieved by using multi-spectral structure pump light, but the generation of multi-spectral pumping is usually based on multi-level amplitude or phase modulation, the system is relatively complex, and the number of spectral lines generated Limited, seriously affecting the delay characteristics of broadband signals

Images