Request InfoInnovation PhotonicsBecause feedback can disrupt applications of quantum cascade lasers and, in some cases, damage the laser, Innovation Photonics has developed the only device that stops the feedback: isolators for 4- to 5-μm and 8-μm wavelengths that feature transmittance of ≤90% and isolation of ≤30 dB.. The laser beam passes through the isolator and from there outward into the application. There, reflections of the laser beam return backward toward the laser. 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