Semiconductor Optical Amplifier (SOA) Coupling Pigtail
Lensed fiber is produced by precision-machining the fiber end into multiple bevels or a cone and forming a planar or spherical lens at the top core region to meet special optical-path, spot, and coupling requirements. Fujin Optoelectronics custom-manufactures lensed fibers with various shaped end faces and can add optical coatings to customer requirements. They mainly couple semiconductor laser chips and are generally used at the input and output of semiconductor fiber amplifiers (SOA, source wording). The front lens of radius R is primarily designed to maximize coupling efficiency for low-NA semiconductor lasers and can be modified for customer applications.
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