Robust External Cavity Diode Losers (ECDL) with Implemented Antireflection Coated 'Blue' Laser Diodes

摘要

Wavelength tuning and spectral characteristics of commercially available standard laser diodes are far from ideal, and therefore many applications in the near infrared are limited to the use of relatively expensive distributed feedback (DFB) laser diodes. External cavity diode lasers (ECDL), in which antireflection (AR) coated Fabry Perot laser diodes can be utilized, can provide a cost-effective alternative with wavelength tuning ranges of up to 100 nm (depending on the centre wavelength), linewidths of several hundred kHz and cw-power of up to 200 mW. They are small-sized and suitable for electronic high frequency modulation which makes these light sources desirable for sensor application. A summary of existing ECDL manufactured by Sacher Lasertechnik is given.