Mandridis Dimitrios, Williams Charles, Ozdur Ibrahim, Delfyett Peter J
CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816, USA.
Opt Express. 2011 May 9;19(10):8994-9. doi: 10.1364/OE.19.008994.
This work presents an extensive investigation of the performance characteristics of a semiconductor-based Theta cavity design laser with an intra-cavity Fabry-Pérot etalon operating at 100 MHz repetition rate. The Theta laser being an external cavity harmonically mode-locked semiconductor laser exhibits supermode noise that impairs its performance. A fiberized Fabry-Pérot periodic filter inserted within the Theta laser cavity mitigates the contribution of the supermode noise to the pulse-to-pulse energy variance by 20 times. The laser has both a compressed output with picosecond pulse duration and a uniform intensity quasi-CW linearly chirped pulse output with 10 nm bandwidth. Long-term stability is attained by referencing the cavity length to the etalon using an intra-cavity Hänsch-Couillaud locking scheme.
这项工作对一种基于半导体的Theta腔设计激光器的性能特性进行了广泛研究，该激光器腔内有一个法布里 - 珀罗标准具，工作重复频率为100 MHz。Theta激光器作为一种外腔谐波锁模半导体激光器，存在超模噪声，这会损害其性能。插入Theta激光腔内的光纤化法布里 - 珀罗周期滤波器可将超模噪声对脉冲间能量方差的贡献降低20倍。该激光器既具有皮秒脉冲持续时间的压缩输出，又具有带宽为10 nm的均匀强度准连续线性啁啾脉冲输出。通过使用腔内汉施 - 库伊拉尔德锁定方案将腔长与标准具进行参考，可实现长期稳定性。
