Suppliers of Continuously Variable Optical Attenuators

Leading companies offering continuously variable optical attenuators include LASNIX, Coherent, EKSMA Optics, Pasternack, and ARRA, each providing specialized solutions for laser and RF applications.LASNIXLASNIX specializes in continuously variable attenuators for CO₂ lasers, using proprietary free-standing metal grid technology. Their devices precisely control power and polarization without affecting beam alignment or mode structure. The attenuators can be mounted directly on lasers and feature rotatable grid polarizers for independent adjustment of polarization direction. LASNIX products are particularly suited for infrared laser applications and high-power CO₂ laser systems, preserving beam quality even at maximum power levels .CoherentCoherent offers the Lasercam™ Continuously Variable Attenuator, designed for adjustable laser beam attenuation from 10⁷:1 to 3000:1. These attenuators handle up to 1 W/cm² or 100 mJ/cm² at 632.8 nm and integrate with BeamView™ 4.4 software for beam profiling. They are compatible with pulsed and CW lasers, providing precise control over beam intensity, divergence, and uniformity. Coherent's products are widely used in research and industrial laser measurement applications .EKSMA OpticsEKSMA Optics manufactures manual and motorized continuously variable attenuators for linearly polarized laser beams. Their devices combine high-performance polarizing cube beamsplitters and half-wave plates, supporting wavelengths from 257 nm to 1064 nm. Motorized models allow continuous intensity adjustment and are suitable for high-power Nd:YAG or femtosecond Ti:Sapphire lasers, making them ideal for ultrafast laser experiments and precision optical setups .PasternackPasternack provides RF and microwave continuously variable attenuators with 50 Ohm impedance and SMA connectors, covering 1 GHz to 18 GHz. Their attenuators range from 7 dB to 40 dB and can handle up to 5 Watts. Pasternack's products are ISO 9001:2015 certified, bidirectional, and include Pi attenuator designs. They are widely used in microwave, RF, and millimeter-wave systems, with same-day shipping from a large inventory .ARRAARRA offers a comprehensive line of continuously variable attenuators for RF and microwave applications, including miniature and mid-sized models. Their products feature wide attenuation ranges, linear calibrated dials, and rugged construction, with options meeting MIL standards. ARRA attenuators are suitable for custom system integration and high-reliability applications .SummaryThese companies provide a range of optical and RF/microwave attenuators with features such as manual or motorized control, high power handling, polarization management, and wavelength-specific designs. Selection depends on the application type—laser research, industrial laser systems, or RF/microwave signal control. For specialized needs, contacting the manufacturer directly is recommended to ensure compatibility with specific laser wavelengths, power levels, or system requirements.