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Experimental Study on Ultrashort Pulse Optical Fiber Source

Author: WeiYing
Tutor: LiShiChen
School: Tianjin University
Course: Physical Electronics
Keywords: Regenerative mode-locked fiber laser CSRZ Passively mode-locked fiber laser Nonlinear polarization rotation
CLC: TN248
Type: Master's thesis
Year: 2007
Downloads: 122
Quote: 1
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Abstract


This dissertation work in close connection with a research focus in the field of optical communications, combined with the National Natural Science Foundation project \high-resolution optical coherence tomography system core components and systems \The study focused fiber ultrashort pulse light source, as follows:, 20GHz regeneration mode-locked fiber laser basic theory and experimental research. Starting from the basic principles of regenerative mode-locking and optical phase-locked analysis of the technical principles of the completion of the regeneration circuit design and performance testing of components; discussed dispersion shifted fiber (DSF) the filter suppresses supermodel noise programs, as well as qualitative analysis of their impact on the pulse parameters; numerical simulation of the design and production of the the meet 20GHzRMLFL optical cavity gain the saturated output requirements of the EDFA; 2. 10GHz regeneratively mode locking fiber lasers have been successfully developed based on the 20GHz light experimental design program. , 20GHz carrier suppressed return to zero (CS-RZ) code Experimental Study of the light source 1. Comparative analysis of the transmission performance of the CS-RZ code, brief use of a zero offset of the Mach-Zehnder lithium niobate modulator transmittance CS-RZ code generation mechanism; 2. experimental realization the 10GHz RF modulation to produce the 20GHz carrier suppressed RZ optical pulses, and confirmed effectively achieved when the carrier suppression is modulated at the bottom; 3. use of 20GHz RMLFL output light pulse. seed light, time division multiplexing and precision phase shift control 40GHz WDM system design of the CS-RZ light source. Third, the passively mode-locked doped doped fiber laser experiments. Theoretical analysis of the basic principles of the passively mode-locked lasers using nonlinear polarization rotation effect, the principle of self-starting passively mode-locked fiber ring soliton laser experiment; 2. on the new cavity that \, and to achieve a perfect self-starting operation, in the pulse width, stability, and the boot on the reproducibility than traditional annular cavity has significantly improved, and the next step in the improved scheme from the dispersion compensation angle. The results of experimental work program is the first of its kind in the country.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser
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