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Rod Lens Holder, Fiber Coupling Optics

Rod Lens Holder, Fiber Coupling Optics
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Rod Lens Holder, Fiber Coupling Optics - 1

M a n u a l P o s i t i o n i n g 953 Email: sales@newport.com • Web: newport.com MANUAL ROTATION AND TILT STAGES MANUAL LINEAR STAGES MANUAL ACTUATORS MANUAL FIBER ALIGNMENT Rod Lens Holder Model FPH-L Rod Lens Holder holds Gradient Index (GRIN) lenses and other miniature optics with diameters up to 2 mm. It inserts into any FP Series Positioner and has a detent alignment groove that engages with the positioner to keep the lens horizontal. A burr-free sliding clip holds the optic securely in the V-groove. Ordering Information Model Description FPH-L Rod Lens Holder • Mount gradient index lenses up to 2 mm diameter • Lens securely held in a V-groove with a spring clip • Lens holder can be mounted using an MPH Series Post Holder Model FPH-L ø.25 (6.4) 3.00 (76.2) .100 (2.5) .375 (9.5) Fiber Coupling Optics Spherical Ball Micro Lenses Spherical Ball Micro Lenses are commonly used for: laser collimating and focusing; laserto- fiber coupling; fiber-to-fiber coupling; and fiber-to-detector coupling. Four diameters are available — 1, 2, 3, and 5 mm. Large spheres are easier to handle and ease the sensitivity of translational alignment. However, smaller spheres fit into smaller packages. The addition of a broadband MgF2 antireflection coating centered at 830, 1300 or 1550 nm results in a highly efficient lens due to the high refractive index of the glass. Coupling efficiency is generally >90% due to the simplicity of these lenses. Please see page 477 Gradient Index Micro Lenses Gradient Index Micro Lenses have a radially varying index of refraction that causes an optical ray to follow a sinusoidal propagation path through the lens. They combine refraction at the end surfaces along with continuous refraction within the lens. A lens is said to have a pitch of 1.0 if it's length is such that a ray completes one sinusoidal period in traveling through the lens. A 0.25-pitch lens will collimate a point source or focus a collimated beam. Two 0.25-pitch lenses in series are commonly used for fiber-to-fiber coupling. A 0.29-pitch lens takes a diverging beam from a source or fiber and converts it to a converging beam that may be imaged on a fiber or detector. 0.15-pitch lenses collimate the diverging beam from a packaged laser diode source allowing a 1 mm working distance to accommodate the diode package constraints. 1.0 Pitch Ray Path in Gradient Index Micro Lenses Please see page 478 for our large selection of individual Gradient Index Micro Lenses optimized for operation at 630, 830, 1300 and 1560 nm wavelengths.

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