We report on the phase-locking of two diode lasers based on self-seeded tapered amplifiers. In these lasers, a reduction of linewidth is achieved using narrow-band high-transmission interference filters for frequency selection. The lasers combine a compact design with a Lorentzian linewidth below 200 kHz at an output power of 300 mW for a wavelength of 780 nm. We characterize the phase noise of the phase-locked laser system and study its potential for coherent beam-splitting in atom interferometers.

We present a compact and transportable inertial sensor forprecision sensing of rotations and accelerations. The sensor consistsof a dual atom interferometer operated with laser-cooled 87Rb.Raman processes are employed to coherently manipulate the matterwaves. We describe and characterize the experimental apparatus. Amethod for passing from a compact geometry to an extendedinterferometer with three independent atom-light interaction zones isproposed and investigated. The extended geometry will enhance thesensitivity by more than two orders of magnitude which is necessaryto achieve sensitivities better than 10-8rad/s/\(\sqrt{\rmHz}\).

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 1W, with a linewidth of less than 85kHz, 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.