We have developed an extended-cavity tunable diode laser system that has a small linewidth and a large output power (more than 90% of the free-running power) whose operating frequency can be conveniently locked to a transition line of Rb atoms. Based on flat-mirror feedback and frequency self-locking and with weak feedback, we have achieved a continuous frequency detuning range greater than 900 MHz and a short-time linewidth stability of better than 0.4%. By using a two-step locking procedure we not only can lock the laser frequency but also can detune the frequency to any desired value. The locking is quite sturdy and rugged.
© 2004 Optical Society of America
(140.2020) Lasers and laser optics : Diode lasers
Original Manuscript: December 12, 2003
Revised Manuscript: June 23, 2004
Published: October 10, 2004
Wenge Yang, Amitabh Joshi, Hai Wang, and Min Xiao, "Simple method for frequency locking of an extended-cavity diode laser," Appl. Opt. 43, 5547-5551 (2004)