Accession Number:

ADA614428

Title:

Quantum Cascade Laser Tuning by Digital Micromirror Array-controlled External Cavity

Descriptive Note:

Journal article

Corporate Author:

SPECTRAL SCIENCES INC BURLINGTON MA

Report Date:

2014-01-01

Pagination or Media Count:

8.0

Abstract:

A quantum cascade laser QCL tuning mechanism based on an external laser cavity containing a Micro ElectroMechanical System MEMS spatial light modulator in the form of a two-dimensional digital micromirror array DMA is described. The laser is tuned by modulating the reflectivity of DMA micromirror pixels under computer control. The resulting functionality enables fast 0.1ms switching time digitally controlled random-access wavelength tuning, high-bandwidth wavelength modulation 30kHz modulation rate, and stable wavelength locking of the laser output. With one or more QCL gain elements built into the cavity, it is possible to cover a wide portion of the mid-wave andor long-wave spectral range with a single device. The fast wideband digitally controlled laser tuning technology described is applicable to other tunable laser including solid-state, diode, gas, and fiber lasers

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE