> Purpose tapered lensed fiber is made by Chu-precision grinding equipment, optical fiber end face grinding tapered; after special processing means processing the optical micro ball lens at its tip, so as to expand the fiber numerical aperture, increase revenue The purpose of the optical capability. Mainly used for the light spot near circular DFB, coupled SLD laser. > Features a high coupling efficiency, easy to use, reliable, on SLD laser coupling efficiency of> 30%. > Beam Analysis Pictures> Outline schematic> lens working schematic:> Performance indicators Product Specifications Fiber Type single / multimode fiber 250μm / 400μm fiber polarization maintaining customer / provider of specialty fiber cone angle θ θ = 30 ~ 33 ° (standard) , θ = 52 ~ 55 ° (standard), θ = 110 ~ 120 ° (standard) or the customer (30 ~ 120 °) ± 2 ° lens radius r 4 ~ 20μm (standard) or customer requirements ± 1μm A bare ends Lengthening ≥0.1mm (standard), or customer requirements ± 0.2mm B metalization length to customer requirements ± 0.5mm C slender bare root 0mm (standard), or customer requirements ± 0.5mm D stripping the total length of the fiber to customer requirements ± 0.5mm total fiber length customer Requirements + 0.5m coating thickness 3 ~ 4μm (standard) or 1 ~ 10μm (customer request) gold layer coating thickness not less than 0.1μm Rally> 10N (conditions: Secretary Chu Xinggong hot solder process) Operating Temperature -40 ~ + 85 ℃ Recommended soldering temperature of 280 ~ 300 ℃ recommended solder 80% Au / 20% Sn facet coating according to customer requirements plated connector type FC, SC or customer requirements