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671-nm Laser

Photonics.com
Jul 2012
Laser Quantum Ltd.Request Info
 
STOCKPORT, England, July 18, 2012 — Laser Quantum UK has launched the tau 671-nm laser with a compact mono-block design that makes it suitable for OEM integration.

It outputs up to 50 mW with a stable TEM00 diffraction-limited beam. The single-transverse-mode continuous-wave red laser is used in Raman and fluorescence spectroscopy, and in DNA sequencing.

Features of the hermetically sealed laser include a permanently aligned cavity, noise <1% rms, RS-232 control, an ~100-GHz bandwidth, beam divergence <1 mrad, M2 <1.2, pointing stability <10 μrad and a polarization ratio >100:1. Polarization direction is horizontal, coherence length is ~3 mm, beam angle is <2 mrad, and operating temperature is from 22 to 37 °C.


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GLOSSARY
fluorescence spectroscopy
The spectroscopic study of radiation emitted by the process of fluorescence.
Raman spectroscopy
That branch of spectroscopy concerned with Raman spectra and used to provide a means of studying pure rotational, pure vibrational and rotation-vibration energy changes in the ground level of molecules. Raman spectroscopy is dependent on the collision of incident light quanta with the molecule, inducing the molecule to undergo the change.  
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