Design and construction of cost-effective tapered amplifier systems for laser cooling and trapping experiments

Abstract

This department welcomes brief communications reporting new demonstrations, laboratory equipment, techniques, or materials of interest to teachers of physics. Notes on new applications of older apparatus, measurements supplementing data supplied by manufacturers, information which, while not new, is not generally known, procurement information, and news about apparatus under development may be suitable for publication in this section. Neither the American Journal of Physics nor the Editors assume responsibility for the correctness of the information presented. Manuscripts should be submitted using the web-based system that can be accessed via the American Journal of Physics home page, http://ajp.dickinson.edu and will be forwarded to the ADN editor for consideration.

Time-domain diffuse correlation spectroscopy

“…Such a laser is not readily available commercially, but requires modifying commercial components. We developed a TD-DCS light source based on a two-stage laser master oscillator and amplifier (MOPA) configuration [32,33]. As a seed laser for the amplifier, we used a monolithic distributed Bragg reflector (DBR) laser at 852 nm with a CW coherence length of 10 m and 280 mW average optical power (PH852DBR280TS, Photodigm, Inc.).…”

Ultralong temporal coherence in optically trapped exciton-polariton condensates

“…An integral component of this laser system is the external-cavity diode laser (ECDL) 26,38,39 . In this setup, a laser diode emitting at 760 nm is initially mounted in a tube equipped with an aspheric collimation lens with a focal length f = 4.51 mm [denoted as L1 in Fig.…”

“…In our case, this restriction was circumvented by implementing a tapered amplifier (TA) system for amplifying the low output of the seed ECDL, while simultaneously preserving its spectral properties (wavelength, linewidth etc.) 26,42 . In the TA chip light from the seed is initially inserted from the narrow aperture into a short, straight, index-guided section [Fig.…”

Investigation of Optical Ionization of Strontium via 5s21S0 ⟶ 5s5p 3P1° ⟶ 5s5d 3D2 ⟶ 4dnp (or 4ndf, n = 39) for Isotope Selectivity Enhancement

“…Also of note is the fact that the 1 st intercombination transition e ciency is too low to be saturated by the laser output of about 12 mW. One future plan is to have a tapered ampli er [27]coupled with our ECDL, which would be e ective for increasing the laser power up to watt class while maintaining the basic characteristics of our ECDL, such as its narrow linewidth. However, without optical ampli cation of the laser output, the resonance ion counts at the newly investigated 689 nm-487 nm-393 nm transition revealed near to the resonance ion counts at the referenced giant resonance transition (460 nm-405 nm).…”