Frequency locking of tunable diode lasers to a rubidium-stabilized ring-cavity resonator.
We demonstrate a technique for locking the frequency of a tunable diode laser to a ring-cavity resonator. The resonator is stabilized to a diode laser that is in turn locked to an atomic transition in rubidium, thus giving it absolute frequency calibration. The principal advantage of the ring-cavity design is that there is no feedback destabilization of the laser. The cavity has a free-spectral range of 1.3 GHz and Q of approximately 35, which provides robust locking of the laser. The locked laser is able to track large scans of the cavity.
Banerjee
Ayan
A
Department of Physics, Indian Institute of Science, Bangladore 560 012, India.
Das
Dipankar
D
Rapol
Umakant D
UD
Natarajan
Vasant
V