Reid J, Cassidy D T, Menzies R T
McMaster University, Departments of Physics and Engineering Physics, Hamilton, Ontario L8S 4M1
Appl Opt. 1982 Nov 1;21(21):3961-5. doi: 10.1364/AO.21.003961.
Measurements of the linewidths of Pb-salt diode lasers operating in the 8- and 9-microm region are reported. The linewidths of the 9-microm lasers were determined by conventional heterodyne techniques, while for the 8-microm lasers a new technique based on a Fabry-Perot etalon was used. The new technique avoids the complexity and limited wavelength range of the heterodyne measurements and can be used for any tunable laser. The linewidths observed varied from 0.6- to >500-MHz FWHM. The linewidth was found to vary dramatically from device to device, to depend strongly on junction temperature and injection current, and to be correlated with vibrations caused by operation of a closed-cycle refrigerator.
报道了在8微米和9微米波段工作的铅盐二极管激光器线宽的测量结果。9微米激光器的线宽通过传统外差技术测定，而对于8微米激光器，则采用了基于法布里-珀罗标准具的新技术。新技术避免了外差测量的复杂性和有限的波长范围，可用于任何可调谐激光器。观察到的线宽半高宽在0.6至大于500兆赫兹之间变化。发现线宽在不同器件之间变化很大，强烈依赖于结温和注入电流，并且与闭环制冷机运行引起的振动相关。
