Research on Semiconductor Optical Amplifier-based Multi-wavelength Fiber Laser
|Keywords||Multi - wavelength fiber lasers A semiconductor optical amplifier Gain saturation effects High birefringence fiber loop mirror Dense Wavelength Division Multiplexing|
The multi-wavelength light source is one of the core technology of dense wavelength division multiplexing transmission system. This thesis is focused on multi-wavelength fiber lasers for the study of the following aspects: 1) using numerical calculation method based on the theory of multi-wavelength semiconductor optical amplifier (SOA) fiber laser research on SOA static gain saturation characteristics in-depth study, first the injection current of the SOA, the incident light power, and the length of the active region its carrier concentration and gain; then discuss the same direction and the opposite incidence SOA carrier concentration of the dual beam and wherein Finally, the case of the gain variation of a light beam; analyzed at two SOA cascaded case, the injection current, as well as different 3dB gain bandwidth of the SOA cascading sequence of the total gain. 2) create a theoretical model for SOA-based fiber ring laser (SFRL), and analysis of its short-term stability characteristics. Second, based on the experimental study of multi-wavelength fiber lasers SOA 1), respectively, for three different internal parameters of SOA to build a multi-wavelength fiber laser experiment, the experimental results were compared. SOA injection current, the gain peak wavelength, 3dB gain bandwidth of the laser cavity loss and other internal parameters of the multi-wavelength fiber laser output. In line with the ITU-T standard interval 18 of 100 GHz wavelength output, each channel output power flatness lt;? 3dB, multi the the wavelength center located 1554.293nm near multi-wavelength output in the C band basically, each wavelength The line width of approximately 0.102nm, the signal-to-noise ratio (SNR) greater than 15dB. By adjusting the polarization controller of the laser cavity to achieve a continuous tunable wavelength group in the 50GHz range overall. 2) to three different parameters of the SOA are paired together cascade is divided into six cases, building a multi-wavelength fiber laser experiment, the experimental results were compared. Two injection current of the SOA, the peak gain wavelength, 3dB gain bandwidth, as well as the cascade of the order of the output results of the multi-wavelength optical fiber laser. And comparative analysis of single SOA-based multi-wavelength fiber laser output. Successfully obtained two sets of multi-wavelength output, one group in line with the ITU-T standard interval 26 of 100 GHz wavelength output, each channel output power flatness lt;? 3dB, multi-wavelength center located 1566.599nm, output multi-wavelength in the CL with each wavelength linewidth of about 0.102nm, signal-to-noise ratio greater than 25dB; another group is in line with the ITU-T standard 25 intervals of 100 GHz wavelength output, each channel output power flatness lt; ± 3dB multi-wavelength center is located 1575.468nm, in the L-band multi-wavelength output, the line width of each wavelength is approximately 0.102nm, signal-to-noise ratio greater than 20dB. 3) was constructed based on the of three SOA cascade structure of the multi-wavelength fiber lasers. Comparative analysis of three different SOA cascade order multi-wavelength fiber laser output.