We provide you with a full range of high-performance insertion loss and return loss solutions! Adaptive insertion loss and return loss detection of optical passive devices in all scenarios; Fast testing speed, wide measurement range, and high testing. We provide you with a full range of high-performance insertion loss and return loss solutions! Adaptive insertion loss and return loss detection of optical passive devices in all scenarios; Fast testing speed, wide measurement range, and high testing. Tech Optics offers a range of return loss and insertion loss test equipment in single channel, multichannel and bi-directional configurations. Contact us to discuss your application with our knowledgeable technical staff. The Industry's Fastest & Most Accurate Optical Return Loss Meters. OptoTest's. JW8307AL series of No-mandrel Insertion loss & return loss tester is a classic and updated version of JW8307 No-mandrel return loss tester. Starting at. Product Description: ILRL-6000 Insertion & return loss test station is a multifunctional instrument developed by our company, which integrates stabilized light source, high-precision optical power meter, insertion loss tester and return loss tester, and is mainly used for insertion loss and return. The global Insertion Loss and Return Loss Analyzer market is projected to grow from US$ million in 2024 to US$ million by 2031, at a CAGR of % (2025-2031), driven by critical product segments and diverse end‑use applications, while evolving U.