(P)FPD Fiber to Photodiode Couplers

561;UL-1045;Full protection;Clear;Plastic;0,92;400-780 nm

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

Polarization Diverse Photodetector; 1310, 1550 nm; Aluminium Enclosure; Signal Conversion Gain >30 V/mW; RF Bandwidth 0-210 MHz; Transimpedance Gain 3x104 V/AOCT and sensor systems require high-performance balanced photodetectors to increase system signal-to-noise ratio (SNR). Polarization-sensitive OCT and similar applications require separate analysis of the two polarization components of a signal.Lunas’ PBPD-001 polarization diverse balanced photodetector module is specially designed for use in such systems and adds polarization sensitivity to the balanced photodetector circuitry of the BPD-002 or BPD-003 balanced photodetector modules.The PBPD-001 polarization diverse balanced photodetector is fully enclosed in a compact, sturdy aluminium box with two optical input ports, a balanced RF output port and two monitor ports for each polarization component and a 12 VDC power supply port.With a bandwidth up to 200 MHz, a transimpedance gain larger than 30K and a saturation power larger than 130 μW, the PBPD-001 polarization diverse balanced photodetector is ideal for integration into laboratory or commercial OCT, fiber sensor, and high performance optical measurement systems with polarization dependent detection requirements.Key Features:Low NoiseHigh Common Mode Rejection Ratio (CMRR): >25 dBHigh Signal Conversion Gain: >30 V/mW (Interference Signal)Wide RF Output Bandwidth (3dB): DC to 210 MHzWavelength Range: 1310 or 1550 nm ±50 nmCompact Size: 100 x 80 27 mmPolarization Crosstalk: <25 dBTransimpedance Gain: 3×104 V/ACW Balanced Saturation Power (At Input): >150 μWCommon Mode Rejection Ratio: >25 dBRF Output Voltage Range (at 50 Ω): ±1.75 VApplications: Polarization Sensitive OCT Systems; Polarization Resolved Sensing; Fiber Optic Distributed Sensing; Instrumentation; Research and Development