All-optical frequency conversion device for subcarrier FM single sideband modulated optical signal
A single-sideband modulation and conversion device technology, applied in the field of communication, can solve problems such as the difficulty of determining the limit of injection parameters, and achieve the effects of low cost, convenient use, and simple structure
Active Publication Date: 2019-04-02
SHANGHAI UNIV
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Problems solved by technology
Currently, the bounds of the injection parameters that produce single-cycle oscillations and four-wave mixing effects are elusive
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[0021] Such as figure 1 As shown, an all-optical frequency conversion device for subcarrier FM SSB modulated optical signals, including an optical power regulator 1, an optical circulator 2, a polarization controller 3, a wavelength-tunable semiconductor laser 4, and a central wavelength and bandwidth equalizer An adjustable optical bandpass filter 5; the output end of the optical power regulator 1 is connected to the I port of the optical circulator 2, and the II port of the optical circulator 2 is connected to the polarization controller 3 through the The wavelength tunable semiconductor laser 4, the III port of the optical circulator 2 is connected to the input end of the optical bandpass filter 5 whose central wavelength and bandwidth are adjustable; the subcarrier frequency modulated single sideband modulated optical signal Inject the wavelength-tunable semiconductor laser 4 under the condition of weakly injected single-sideband effect or four-wave mixing effect; the wea...
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The invention discloses an all-optical frequency conversion device for subcarrier frequency modulation single-side-band modulated light signals. The all-optical frequency conversion device comprises a light power regulator, a light circulator, a polarization controller, a wave-length-adjustable semiconductor laser and a central-wavelength and bandwidth adjustable light band pass filter. A port I of the light circulator is connected with the output end of the light power regulator, a port II of the light circulator is connected with the wave-length-adjustable semiconductor laser through the polarization controller, and a port III of the light circulator is connected with the input end of the central-wavelength and bandwidth adjustable light band pass filter. The subcarrier frequency modulation single-side-band modulated light signals are injected into the wave-length-adjustable semiconductor laser under the condition of a weak-injection single side band or four-wave mixing effect; frequency detuning delta f and radio frequency subcarrier frequency f1 of the subcarrier frequency modulation single-side-band modulated light signals meet the conditions that the delta f is not equal to Nf1 and the f1 is not equal to N delta f, wherein the N is an integer. The light power regulator comprises a variable light attenuator and a gain-adjustable light amplifier. The all-optical frequency conversion device has the advantages that RF (radio frequency) frequency and light carrier wavelength of subcarrier signals can be changed without demodulation of the subcarrier signals from light carriers.
Description
technical field [0001] The invention relates to an all-optical frequency conversion device for an optical signal, in particular to an all-optical frequency conversion device for a subcarrier frequency-modulated single-sideband modulated optical signal, and belongs to the technical field of communication. Background technique [0002] With the rapid development of information technology, the problem of frequency congestion in wireless communication cannot be ignored, and it is also inevitable in Radio-on-Fire (RoF) systems. An effective solution is to shift the signal to a new frequency, known as frequency transposition. Wireless communication usually uses frequency modulation, while RoF systems often use subcarrier modulation, that is, the frequency of the baseband signal is modulated to the RF subcarrier, and then the modulated RF signal intensity is modulated onto the optical carrier. Since the single sideband (SSB) modulation can effectively avoid the influence of the di...
Claims
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IPC IPC(8): G02F2/02G02F2/00
CPCG02F2/004G02F2/02G02F2/006
Inventor 方捻缪婉仪王陆唐
Owner SHANGHAI UNIV