Narrow bandwidth interference filter-stabilized diode laser systems for the manipulation of neutral atoms

Abstract

We present and investigate different external cavity diode laser (ECDL) configurations for the manipulation of neutral atoms, wavelength-stabilized by a narrow-band high transmission interference filter. A novel diode laser, providing high output power of more than 1 W, with a linewidth of less than 85 kHz, based on a self-seeded tapered amplifier chip has been developed. Additionally, we compare the optical and spectral properties of two laser systems based on common laser diodes, differing in their coating, as well as one, based on a distributed-feedback (DFB) diode. The linear cavity setup in all these systems combines a robust and compact design with a high wavelength tunability and an improved stability of the optical feedback compared to diode laser setups using diffraction gratings for wavelength discrimination.

Micro-integrated extended cavity diode lasers for precision potassium spectroscopy in space

“…They used an intra-cavity interference filter as a frequency selective element and achieved an output power of a few 10 mW with a short term and intrinsic linewidth of 157 kHz and 14 kHz, respectively. Gilowski and co-workers [22] applied this concept to realize lasers for experiments on ultracold Rb atoms and used a tapered gain chip to boost the output power of the laser. They achieved about 1 W of optical power at 780 nm with a short term and intrinsic linewidth of 187 kHz and 85 kHz, respectively.…”

8 × 10^−17 fractional laser frequency instability with a long room-temperature cavity

“…The frequency of a filter-stabilized 698 nm extended-cavity laser diode [19,20] is locked to the cavity via the PoundDrever-Hall (PDH) technique [21]. Light is sent through an offset acousto-optic modulator (AOM), which allows tuning the frequency to the 87 Sr clock transition, and via a 2 m long optical fiber to the vibration isolation table.…”

Cold atom sagnac interferometer (CASI)

“…Using the technique of moving molasses, the atoms are loaded into the interferometry chamber with a temperature of about 8 �K and a drift velocity of 2.8 m/s. The optical cooling is realized by amplified diode laser systems and a new high power self-seeded tapered amplifier [4], [5]. The sensor operates in a so called symmetric Ramsey-Borde configuration consisting of four nl2-pulses enclosing an area of 8.6 mm 2 by the atomic trajectories.…”