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Extracavity Attenuators

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Extracavity Attenuators - Manual

The extracavity attenuator is a polarization based device used to continuously vary the output power of a laser from a very low level to maximum. Two rotating polarizing elements are used. One is fixed to the predominant laser polarization plane while the other is manually rotated about the beam axis. The standard attenuator uses two calcite polarizers, and has a contrast ratio >1000:1. The waveplate version uses a calcite polarizer as the output polarizer (analyzer), and a waveplate as the input. This version has the advantage of zero beam walk-off, but has a lower (100:1) contrast ratio. All optical elements are supplied A/R coated for either 1064 nm or 532 nm, and typical insertion loss is <15% with a well polarized beam.

Related Products: Polarizer Element, Waveplates


Part No. Description:
N1005-1-A Manual attenuator, 2 calcite polarizers
N1005-1-B Manual attenuator, 1 calcite polarizer, 1 waveplate
N1005-1-C Manual attenuator, 1 calcite polarizer, 1 waveplate, for use at both 1064 nm and 532 nm

Extracavity Attenuator, Cable Driven

This version of the extracavity attenuator is available in the same operating modes as described above, but is driven by a flexible cable to allow remote operation from the exterior of a CDRH class I laser safety enclosure without opening the cover.

Related Products: Polarizer Element, Waveplates


Part No. Description
N1005-2-A Cable driven attenuator, 2 calcite polarizers
N1005-2-B Cable driven attenuator, 1 calcite polarizer, 1 waveplate
N1005-2-C Cable driven attenuator, 1 calcite polarizer, 1 waveplate, for use at both 1064 nm and 532 nm

Extracavity Attenuator, Motorized

This version of the extracavity attenuator is motor driven to allow remote power control via computer. The stepper drive motor allows precise rotational control of the variable polarizing element, allowing extremely accurate power control. Stepper motor drive electronics with manual jog control and external input connector for pulse and direction control are standard.  Computer interfaces, such as IEEE-488 and RS 232, are available as options.  

Related Products: Polarizer Element, Waveplates 


Part No. Description
N1005-3-A Motorized attenuator package, 2 calcite polarizers
N1005-3-B Motorized attenuator package, 1 calcite polarizer, 1 waveplate
N1005-3-C Motorized attenuator package, 1 calcite polarizer, 1 waveplate, for use at both 1064 nm and 532 nm
 

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This page was last modified on: 3/14/2011