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DIGITALLY CONTROLLED CHIRPED PULSE LASER FOR SUB-TERAHERTZ RANGE FIBER STRUCTURE INTERROGATION
DIGITALLY CONTROLLED CHIRPED PULSE LASER FOR SUB-TERAHERTZ RANGE FIBER STRUCTURE INTERROGATION
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机译:数字控制的脉冲激光,用于亚太赫兹范围光纤结构探究
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摘要
The present disclosure provides a sweep velocity-locked laser pulse generator (SV-LLPG) controlled using a digital phase locked loop (DPLL) circuit. The SV-LLPG is utilized for the interrogation of sub-terahertz-range fiber structures for sensing applications that require real-time data collection with mm-level spatial resolution. A laser generates chirped laser pulses via injection current modulation and a DPLL circuit locks the optical frequency sweep velocity. A high-quality linearly chirped laser pulse with a frequency excursion of 117.69 GHz at optical communication bands using a distributed feedback laser is provided.
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