Pineda-Vadillo Pablo, Lynch Michael, Charlton Christy, Donegan John F, Weldon Vincent
Semiconductor Photonics Group, School of Physics, Trinity College Dublin, Ireland.
Opt Express. 2009 Dec 7;17(25):23309-15. doi: 10.1364/OE.17.023309.
In this paper the application of Wavelength Modulation (WM) techniques to non-resonant saturation spectroscopy in acetylene-filled Hollow-Core Photonic Bandgap Fibres (HC-PBFs) and modulation-free Laser Diode (LD) frequency stabilisation is investigated. In the first part WM techniques are applied to non-resonant pump-probe saturation of acetylene overtone rotational transitions in a HC-PBF. A high-power DFB chip-on-carrier mounted LD is used in conjunction with a tuneable External Cavity Laser (ECL) and the main saturation parameters are characterized. In the second part a novel feedback system to stabilize the DFB emission wavelength based on the WM saturation results is implemented. Modulation-free locking of the DFB laser frequency to the narrow linewidth saturation feature is achieved for both constant and variable LD temperatures.
本文研究了波长调制（WM）技术在充乙炔的空芯光子带隙光纤（HC-PBFs）中的非共振饱和光谱以及无调制激光二极管（LD）频率稳定中的应用。在第一部分中，WM技术应用于HC-PBF中乙炔泛音转动跃迁的非共振泵浦-探测饱和。一个高功率的载架式DFB芯片LD与一个可调谐外腔激光器（ECL）结合使用，并对主要饱和参数进行了表征。在第二部分中，基于WM饱和结果实现了一种用于稳定DFB发射波长的新型反馈系统。对于恒定和可变的LD温度，都实现了DFB激光频率到窄线宽饱和特征的无调制锁定。
