Opt Lett. 2019 Nov 1;44(21):5270-5273. doi: 10.1364/OL.44.005270.
Diode-pumping of Ti:sapphire provides a low-cost route to high-quality frequency-comb sources, exploiting the potential of direct diode modulation for wideband control of the carrier-envelope-offset frequency. We present here an f- and f-locked, directly diode-pumped Ti:sapphire frequency comb, producing 66-fs pulses at 800 nm and employing f-to-2f interferometry and current modulation of a 462-nm blue laser diode to achieve a stabilization bandwidth extending to ∼70 kHz. Characterizations of the f and f phase noise are compared to relative intensity noise spectra of the pump diodes to provide insights into how the diode design and performance transfer into the comb stability, suggesting a lower contribution to f and f noise from the blue laser diode than from the green diode.
二极管泵浦钛宝石提供了一种低成本的高质量频率梳源的途径，利用直接二极管调制的宽带控制载波包络偏移频率的潜力。我们在这里展示了一种 f-和 f-锁定的直接二极管泵浦钛宝石频率梳，在 800nm 处产生 66fs 的脉冲，并采用 f-到 2f 干涉仪和 462nm 蓝光激光二极管的电流调制来实现扩展到约 70kHz 的稳定带宽。对 f 和 f 相位噪声的特性与泵浦二极管的相对强度噪声谱进行了比较，以深入了解二极管设计和性能如何转化为梳状稳定性，这表明蓝光激光二极管对 f 和 f 噪声的贡献小于绿光二极管。
