Vidia-Discrete
General Operation • 13
General Operation
Overview
The Vidia-Discrete laser is a stable, narrow-linewidth source of tunable
light. The laser operates in three modes: track mode, automated step-
scan mode, and interactive step-scan mode. Use it in track mode to
operate it at a set wavelength. In the step-scan modes, the laser dwells
at evenly spaced wavelengths as it scans. The system can be operated
manually, using the front-panel controls, or remotely, using one of the
computer interfaces (see “Computer Control” on page 23).
What’s Inside
The 64X7 Series Vidia-Discrete laser is an external-cavity diode laser
(ECDL) based on the Littman-Metcalf design (see “Principles of
Operation” on page 47).
The system provides high resolution when stepping between
wavelengths. An ultra-low-noise current source controls the laser’s
output power. A temperature-control circuit actively stabilizes the
laser-cavity temperature for optimal performance.
Connecting Fiber to the Laser
Use only FC/APC-connectorized fiber with the Vidia-Discrete. For
lasers purchased with the polarization-maintaining fiber option, the
polarization is aligned parallel to the key on the FC connector. The
laser output comes to the front panel through a fiber with an optical
isolator of 30 dB, preventing optical feedback into the laser cavity.
64X7 rev E.fm Page 13 Tuesday, April 3, 2001 4:16 PM
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com