Performance And Application Research On Optoelectronic Oscillator And Optic Parametric Amplifier

In this dissertation, the work mainly includes two fields, which are the performance and applications on opotoelectronic oscillator (OEO) and fiber optical paramatic applification (FOPA).In OEO system, long fiber causes much smaller mode spacing compared to the bandwidth of filter. According to theoretical analysis, the side-mode could be suppressed through gain competation among multi-loop, therefore, an optical domain orthogonally combined dual-loop structure is proposed, where the side-mode is suppressed and the noise performace is preserved. Experimental results showed that this scheme can reach the expectation effect.A phase modulator based optoelectronic oscillator (OEO) is utilized to implement a self-starting optical pulse and microwave signal source. A joint of a large-signal directly modulated DFB laser and a phase modulator is for chirps enhancement and short pulse generating. This system is able to generate a 10-GHz optical pulse stream with 141fs timing jitter and 6.5ps pulsewidth along with a high spectral purity electrical signal that is locked to the repetition rate of the optical pulses.Utilizing two light sources injected OEO, in which pattern generator and phase modulator are included, multi-functional outputs are generated simultaneously. A phase modulator is employed to perform feedback modulation and data format conversion between NRZ and RZ with tunable duty ratio. Two lightwaves work together for eliminating the unexpected frequency component introduced by optical coding signal. The experimental results are demonstrated, which show that NRZ, RZ signal and optical, electrical clock are generated at the same time.Based on FOPA, continuous signal light can be converted to an optical pulse stream through FOPA with intensity modulated pump light. Theoretical analysis indicates the qulity of optical pulse can be improved by intensity or phase modulation on signal light at certain pump power, which is also proved by experimental results.In experiment of FOPA, stimulated Brillouin scattering (SBS) can cause the idler optical spectrum broading and be generally suppressed by phase modulation on pump light. A sinusoidal counter-phase phase modulation scheme is proposed through theoretically analyzing the affect of idler optical spectrum broadening due to the phase modulation on pump light in a dual-pumped fiber optical parametric amplification system. In experiment, this scheme was demonstrated first time. Compared with the traditional method, where the PRBS is used as the modulation signal, we found that the use of sinusoidal signal provides better tolerance for the performance of system components.By utilizing the combination of data intensity modulated pump and continuous wave pump or sinusoidal intensity modulated pump, schemes of all optical multi-wavelength conversion and multi-wavelength conversion with data format conversion are presented by using dual-pumped fiber optical parametric amplifier. Experimentally, the multi-wavelength conversion and multi-wavelength conversion with data format conversion between NRZ and RZ are demonstrated. The experimental results indicate that the dual-pumped fiber optical parametric amplifier is able to implement multi-wavelength conversion with signal regeneration in some degree.