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Newport has introduced the manual UVA-800-M and motorised UVA-800-Conex, a set of variable attenuators designed to address the challenge of safely attenuating the output of ultrafast amplifiers.

The new ultrafast variable attenuators are composed of specially designed thin-film polarisers, zero-order achromatic waveplates and high-precision opto-mechanics, enclosed in shuttered housings.

The thin-film polarisers have a high damage threshold and are pre-aligned in the sealed housing to minimise exposure to dust and other contaminants.

These polarisers are utilised in conjunction with a half-waveplate, providing continuously adjustable intensity ratio splitting of the dual S- and P-polarised outputs.

The P-polarised output passes through the first polariser with negligible beam deviation and minimal dispersion.

The S-polarised output is reflected off two polarisers in a parallel offset of 1in from the fundamental, with negligible dispersion.

Both outputs have polarisation contrast ratios greater than 1:450 and require no adjustment over the entire working range.

For added functionality, the sealed housing includes a manual shutter for the S-polarised port and a removable beam dump on the P-polarised port.

The motorised version’s rotational stage has an integrated Conex controller/driver, which is powered and communicates with a computer via USB port.

A free Nstruct applet to control the stage is available for download from Newport’s website.

Newport Corporation is a leading global supplier of advanced-technology products and systems to customers in the scientific research, microelectronics manufacturing, aerospace and defense/security, life and health sciences and precision industrial manufacturing markets. Newport’s innovative solutions leverage its expertise in high-power semiconductor, solid-state and ultrafast lasers, photonics instrumentation, sub-micron positioning systems, vibration isolation, optical subsystems and precision automation to enhance the capabilities and productivity of its customers’ manufacturing, engineering and research applications. Newport is part of the Standard & Poor’s SmallCap 600 Index and the Russell Microcap Index.

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