提出了一种基于压电陶瓷闭环控制的线性可调谐环形腔光纤激光器。光纤激光器环形腔结构中光纤光栅固定在压电陶瓷上，通过控制压电陶瓷改变光纤光栅波长，从而改变环形腔光纤激光器的波长，构成基于压电陶瓷的可调谐环形腔光纤激光器。应变传感器贴附在压电陶瓷上，实时监测压电陶瓷的步长变化，通过惠斯顿桥式电路反馈给驱动控制系统，并补偿和修正压电陶瓷固有的磁滞和蠕变特性，形成压电陶瓷闭环控制系统。实验结果表明基于压电陶瓷闭环控制的可调谐环形腔光纤激光器调谐线性度好，波长调谐范围可达0.9 nm，线宽为4 kHz，波长稳定性为±0.01 nm，功率稳定性为±0.3 dB。

A new micro-vibration sensor based on single-mode fiber ring laser is put forward. The Mach-Zehnder interferometric (MZI) detection technique is presented for interrogating laser frequency shift due to the measurand (piezoelectric transducer (PZT) is used to simulate the micro-vibration) induced laser cavity strain from both single- and multi-mode lasers. In the experiment, compared with multi-mode laser sensors, the single-mode laser sensor is proved to be a sensor with high resolution. When the PZT is driven by the analog signal (0.03 rad near 2 kHz), the signal-to-noise ratio (SNR) of output signal from the single-mode laser sensor is close to 55 dB and the sensitivity of the sensor is about 5\times10^{-5} rad/Hz^{1/2}.

基于半导体光纤环形腔激光器的四波混频型可调谐全光波长转换器的宽带理论模型,从理论上研究了输入信号光功率、注入电流、两个耦合器的耦合比、激射光波长和半导体光放大器有源区长度对转换光频率啁啾的影响.结果表明:转换光的频率啁啾随着输入信号光峰值功率、注入电流以及SOA有源区长度的增大而增大,随两个耦合器耦合比的增大而减小.

利用环形腔结构在L波段获得了43 nm(1567.1 nm～1610.1 nm)范围的宽带连续可调谐激光输出.由于同时采用了高浓度掺铒光纤和1480 nm激光二极管(LD)抽运源,极大地降低了激光器的抽运阈值,提高了斜率效率和输出功率.在整个可调范围内,激光器的输出功率达10.9 dBm～12.1 dBm(95 mW抽运),信噪比高于60 dB,在1585 nm的斜率效率为0.201.

利用注入锁定技术,将中心频率稳定、窄线宽的DFB LD作为主激光器,将光纤环形腔激光器作为从激光器.在实现注入锁定后,利用光纤环形腔谐振特性,有效压窄了注入光线宽.得到了中心频率稳定,较之DFBLD线宽更窄的输出激光,目前线宽已被压窄到70 kHz.