OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method

Abstract

The invention discloses an OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method, and belongs to the field of all-optical wavelength conversion. Adirect modulation laser is adopted to realize light intensity modulation to generate an optical OFDM signal, a polarization diversity structure is adopted, the coupled signal light and pump light aredivided into two mutually orthogonal polarization modes (X polarization direction and Y polarization direction) by a polarization beam splitter, FWM-based all-optical wavelength conversion on the same polarization state is separately realized in two SOA, the two mutually orthogonal polarization modes after FWM are coupled together by a polarization beam combiner, then the converted optical OFDM signal is filtered by an optical band pass filter and is converted into an electric OFDM signal after photoelectric detection, and the OFDM signal is received by a receiver. According to the OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method, no additional external modulator is required to modulate the signal, the system cost is reduced; andthe OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device is simple in structure, and has the advantages of wide adjustment, low polarization sensitivity, easy system integration and high practicability.

Description

technical field [0001] The invention belongs to the technical field of All Optical Wavelength Conversion (AOWC for short), and specifically relates to a low-cost, low-polarization-sensitive, wide-tunable wavelength conversion device and method based on OOFDM signals. Background technique [0002] Since Kao Kung proposed in 1966 that quartz glass fiber could be used as the medium of optical communication, optical fiber has played an increasingly important role in modern communication due to its advantages of large capacity, strong anti-interference ability, low loss, and good confidentiality. With the explosive growth of data services represented by big data and artificial intelligence in the Internet era, people's demand for network bandwidth has grown exponentially. High-speed, high-quality, and ultra-large-capacity optical fiber communication systems have become an inevitable development goal. Although the number of wavelengths at the optical fiber communication window is ...

AI Technical Summary

Problems solved by technology

However, these two dual-pump wavelength conversion schemes both use three lasers, and both use external modulation to modulate the signal. The system cost is high, which is not conducive to commercial production.

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