title: Frequency locking of tunable diode lasers to a rubidium-stabilized ring-cavity resonator.
abstract: 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.
authors.affiliation: Department of Physics, Indian Institute of Science, Bangladore 560 012, India.
authors.forename: Ayan
authors.initials: A
authors.lastname: Banerjee
authors.forename: Dipankar
authors.initials: D
authors.lastname: Das
authors.forename: Umakant D
authors.initials: UD
authors.lastname: Rapol
authors.forename: Vasant
authors.initials: V
authors.lastname: Natarajan