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摘要:目的
为了提高自注入锁定激光器频率连续可调谐范围,对FP微腔在频率热调谐过程中注入锁定相位的变化关系进行研究。
方法在传统频率热调谐的基础上,对自注入锁定激光器频率和相位等参数特性进行研究,提出一种在频率热调谐时加入自注入锁定相位补偿和DFB芯片电流补偿的改进算法,并在一台基于法布里-珀罗(FP)微腔自注入锁定激光器上对此算法进行验证实验。这台激光器波长为1550 nm,3 dB线宽为785 Hz,通过一对加热电阻对FP微腔进行频率热调谐。
结果改进后的算法在激光器原有驱动控制电路的单片机程序中实现,激光器硬件部分未作任何修改,最终实现了6GHz的频率连续调谐范围。
结论该工作为自注入锁定激光器提供一种简单高效且稳定性好的频率调谐方案,具有较高的实用性和市场前景。
Abstract:ObjectiveIn order to enhance the continuous tunable range of a self-injection-locked laser frequency, a study is conducted on the variation relationship of the injected locking phase of the FP microcavity during the frequency-thermal tuning process.
MethodBuilding upon traditional frequency thermotuning methods, this study explores the characteristics of frequency and phase parameters of a self-injection locked laser. We proposed an improved algorithm that integrates injection locking phase compensation and DFB chip current compensation during frequency thermotuning. Experimental validation of this algorithm was conducted on a Fabry-Perot (FP) micro-cavity self-injection locked laser. The laser operates at a wavelength of 1550nm with a 3dB linewidth of 785Hz, achieving frequency thermotuning of the FP micro-cavity using a pair of heating resistors.
ResultThe enhanced algorithm is implemented within the microcontroller program of the laser's original drive control circuit. No modifications are made to the hardware components of the laser. Ultimately, this implementation achieves a continuous frequency tuning range of 6 GHz.
ConclusionThis work provides a simple, efficient, and stable frequency tuning solution for self-injection-locked lasers, demonstrating high practicality and promising market prospects.
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Key words:
- lasers /
- frequency tuning /
- self-injection locking /
- narrow linewidth
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