(P)FPD Fiber to Photodiode Couplers

Receptacle Style; 375 to 2000 nm; Wavelength Accuracy ±5 to ±30 nm; Coupling Efficiency 10% to 75%; Fiber Type SM, MM or PM OZ Optics’ HULD series of receptacle style laser diode to fiber couplers is offering optimum coupling in a small, rugged package. The couplers may be purchased prealigned, with the diode already in place, or as a kit that can be assembled by the customer using their own diode. The complete assembly procedure is quite straightforward. An assembly and operating instruction video on a USB drive, showing the alignment process, is available. In addition, a complete alignment kit is available, which includes the laser diode collimation wrench, multimode fiber assembly, centering lens, and video instructions. Diode source couplers are available for a variety of diode case sizes, and for diode wavelengths from 375 nm to greater than 2000 nm. These source couplers work with MM, SM and PM fiber. HULD connector receptacle style couplers have a female receptacle, such as NTT-FC, or AT&T-ST, etc. at the output end. This allows the user to connect any optical fiber with a matching male connector to the diode. HULD laser diode to fiber couplers are available in different diameters from 0.79 inch to 1.3 inch. These tilt adjustable source couplers can be used over a temperature range of -25 °C to +60 °C and have been vibration tested. Higher temperature versions are available on request OZ Optics also offers special, low cost, miniature receptacle style laser diode to fiber couplers for OEM applications. These packages use just a single lens to couple light from the laser diode into the fiber. They do not use OZ Optics tilt adjustment technique. This package features a compact, rugged housing, at a lower cost. A variety of options like a built-in isolator, a blocking screw to attenuate the output beam as well as polarizers or polarization rotators in the middle are also available. Key Features: 375nm to 2000nm Variety of Standard Packaging Options SM, MM or PM fiber Rugged Design Custom Design for Diodes High-power Version Applications: Fiber Optic Communications; Optical Alignment Systems; Process Control; Optical Sensors; Medical Apparatus; Imaging Systems ; Test and Measurement Systems

Receptacle Style; 180 to 2000 nm; Coupling Efficiency >60% to >80%; Backreflection -14 to -60 dB; Power Handling >1 to >100 W In OZ Optics' HPUC series of receptacle style, non-contact style laser to fiber couplers, an air gap exists between the fiber and the lens. This design is more flexible, allowing a wide range of lens types and focal lengths to be used. The distance between the fiber and the lens can be adjusted to compensate the changes in the source wavelengths or to intentionally defocus the laser beam to prevent arcing in high power laser to multimode fiber applications. Couplers using GRIN lenses, achromats, aspheres, fused silica, plano-convex, and biconvex lenses have all been made utilizing this design. Non-contact style couplers can handle input powers of up to 100 W CW, and even higher energies from pulsed sources. They are best suited for applications where either the input energy is higher than 400 mW, or when more than one wavelength is to be coupled into the fiber, or for input beams that have unusually large beam diameters or divergence angles. They also have superior polarization maintaining capabilities compared to physical contact style couplers. However because of the air gap between the fiber and the lens, the backreflection level for the endface of the fiber is about -14 dB. This can be reduced to -40 dB to -60 dB by slant polishing both fiber ends to deflect the backreflected signal. There is a significant variation in the endface geometries of angled PC (APC) connectors. This effects the spacing between the endface of the fiber and the lens. To minimize this variation, OZ Optics offers an angled flat (AFC) connector. This connector features a beveled endface where the fiber itself is angled but the ferrule tip is flat. This geometry provides optimum repeatability between connections. For users of SMA connectors, please note that standard SMA connectors and receptacles are constructed to rather loose tolerances, leading to poor repeatability. For core diameters of 100 µm or smaller, we recommend using SMA connectors with Zirconia ferrules and receptacles with Zirconia sleeves. This will give maximum repeatability. Better still, consider using FC connectors instead. Key Features: High Power Handling Wide Range of Lenses Excellent Polarization Maintaining Capabilities Different Connector Receptacle Versions Wide Wavelength Ranges Applications: Laser Shows/Entertainment; Spectroscopy; Interferometric Sensors; Fluorescence Measurements; Medical, Pharmaceutical & Chemical Sensors; OEM Laser Systems