Ultra High Power Fiber Coupled Isolator

SKU: FHOI

The FHOI series fiber-coupled optical isolators are designed for kilowatt-class, single-polarization laser systems, incorporating Agiltron’s proprietary configuration with advanced thermal lensing and wavelength shift compensation technologies to ensure stable performance under high optical radiation. These isolators deliver broadband isolation, achieving >40 dB over a 100 nm bandwidth and >30 dB over 300 nm, with power handling up to the kilowatt level. This is accomplished through beam expansion and collimation to reduce power density by matching the beam to the aperture size. Covering a wide spectral range from 450 to 2450 nm, the standard model is centered at 1550 nm, with an optional built-in output tap monitor available. For 1550 nm lasers, the maximum aperture is 10 mm, while for shorter wavelengths such as 1060 nm and 980 nm, it reaches up to 30 mm. The FHOI uses specialized fibers with core diameters greater than 20 µm, available in both single-mode and polarization-maintaining configurations. The output fiber collimator requires water cooling, while the input collimator has a unique passive built-in liquid circulating design.