(P)FPD Fiber to Photodiode Couplers

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

Adjustable Focus; 200 to 2100 nm; Power >5 to >100 W CW; Coupling Efficiency >70% to >90%; Fiber Type SM, MM or PM HPUC-2A adjustable focus source couplers are ideal for situations where optical coupling efficiency is critical, such as in high power applications. A special connector allows the spacing between the fiber and lens to be precisely controlled without rotating the fiber. This is ideal in polarization maintaining applications, as the polarization axis does not change. The adjustments allow to compensate for any change in wavelength or beam wave location, thus further optimizing the coupling efficiency. The optimized coupling efficiency leads to minimized heating of the fiber, especially important with high power. Adjustable focus couplers are available with a variety of lens types and fiber types. Internal surfaces are angle polished and/or AR coated to minimize backreflection. Typical backreflection levels are -40dB, with -60dB available for certain options. In our OZ Optics portfolio you also find fiber patchcords with adjustable FC/PC connectors only. For more information please see the patchcord section or contact us for further assistance. Key Features: Can handle power up to 100 W CW Patented connector designs for precise coupling with focus adjustment Excellent coupling efficiency up to 90% Operating wavelengths 200 nm to 2100 nm Fiber end caps with ±25 µm thickness tolerance Applications: Laser Marking, Cutting & Welding; Laser Shows & Entertainment; Materials Processing; High-power Spectroscopy; Non-linear Optics; Laser Surgery; LIDAR; Interferometric Sensors; Laboratory; Education & Training; Visual Laser Alignment for Manufacturing; Medical, Pharmaceutical & Chemical Sensors; Fluorescence Measurements; OEM Laser Systems

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

Pigtail Style; 375 to 2050 nm; Laser Diode Power 5 to 150 mW; Coupling Efficiency 25% to 55%; Fiber Type SM, MM or PM OZ Optics’ LDPC series of pigtail 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 and can be done in less than twenty minutes. A complete alignment kit, which includes tools and video instructions, is available separately. Laser diode source couplers are available for a variety of diode case sizes, and for diode wavelengths from 375 nm to greater than 2050 nm. These source couplers work with MM, SM and PM fiber. Pigtail style laser diode to fiber couplers provide higher coupling efficiencies and lower backreflection levels than receptacle style couplers, as well as better stability. The output fiber can be terminated with different output connectors, as desired. Laser diode to fiber couplers are available in different diameters from 0.5 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 pigtail 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 significantly 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 2050nm Variety of Standard Packaging Options SM, MM or PM fibe Rugged Design Applications: Fiber Optic Communications; Optical Alignment Systems; Process Control; Optical Sensors; Medical Apparatus; Imaging Systems ; Test and Measurement Systems; OCT Systems

Pigtail Style; 200 to 2100 nm; Coupling Efficiency >60% to >80%; Backreflection -35 to -60 dB; Power Handling >1 to > 100 W OZ Optics' LPSC pigtail style laser to fiber couplers are recommended for permanent or semi-permanent situations, where optimum coupling efficiency, output stability, and minimum backreflection are desired. In these couplers the fibers are permanently glued to the focusing lens. The fiber-lens assembly is then inserted into the tilt adjustment flange and held in place with two radial set screws. Because the fiber is permanently attached to the lens, the fiber cannot be replaced without also replacing the coupling lens. In pigtail style couplers the internal endface of the fiber is polished at an angle to reduce backreflection. This ensures <-40 dB backreflection. By adding an anti-reflection coating to the inner fiber tip, backreflection can be further improved to -60dB. Key Features: Wavelength Range 200 nm to 2100 nm Coupling Efficiency up to 90% Polarization Maintaining Capabilities up to 35 dB Rugged, Compact, Stable Design Low Backreflection Environmentally Stable Adjustable Output Power Applications: Interferometric Sensors; Medical, Pharmaceutical & Chemical Sensors; Fluorescence Measurements; Spectroscopy; Laser Shows/Entertainment; OEM Laser Systems

For 3 to 5 Wavelengths; 400 to 660 nm; Return Loss 40 dB; Insertion Loss <1.5 to <2.8 dB; Fiber Type SM, MM or PM OZ Optics’ RGB (Red/Green/Blue) combiners and delivery systems use custom optics and dichroic filters to combine efficiently three to five visible lasers into a common output port – providing a complete method to deliver full color laser light from a SM, PM or MM fiber. The RGB combiner can be provided as a pigtailed passive device or as a low profile RGB laser engine with or without built-in laser diode drivers to combine light from three to five different wavelength sources (red, green, and blue are the most common) to generate output light that is white in appearance from a single fiber. By varying the relative intensities of the individual transmitted visible lasers, one can generate a spectrum of colors. The fiber is protected with a rugged, flexible cable. The light from the output fiber can be collimated using an optional achromatic collimator to give near ideal Gaussian beams ranging from 0.6 mm to 10 mm in diameter. Alternatively, achromatic focusers can be supplied to focus the light to spots only a few microns in diameter. Key Features: Combine up to five visible wavelengths (400 nm to 660 nm) Compact Footprint- MM, SM and PM Fiber Versions High Power Handling Low Insertion and Return Losses Applications: White Light Displays; Confocal Microscopy; Laser Spectroscopy; Fluorescence Microscopy; Color Holography and Imaging Systems; Flow Cytometry

Combines Two Polarized Laser Diode Outputs into Single Fiber; Coupling Efficiency 45% to 90%; Backreflection Level -25 to -60 dB; Pigtail/Receptacle Versions; Fiber Type SM, MM or PM OZ Optics' ULBS, TRBS and WDM laser diode power combiners are designed to combine two polarized laser diode outputs into a single fiber. The output fiber can be SM, MM or PM fiber. Fiber-to-fiber polarization combiners/splitters are also available. The device utilizes a beam splitter in reverse, to act as a combiner. The laser diode outputs are collimated, and then attached onto the combiner. The collimated laser diode outputs are rotated until the maximum light comes out of the splitter/combiner output. The combined beam is then focused into the output fiber using OZ Optics' patented tilt adjustment technique. Laser diode power combiners come in a small, rugged package and are available either with female receptacles to accept different connectors (NTT-FC, AT&T-ST, etc.), or pigtail style, with the fiber directly attached. Pigtail style combiners are recommended for optimum stability, minimum insertion losses, and low backreflection. Receptacle style systems are best suited for applications where the output coupler is used with a MM fiber.The coupling efficiency from each diode is about 75% to 90% for MM fibers and 45% to 55% for SM fibers. The typical backreflection level returning to the laser diode is -20 dB. Backreflection levels of -25 dB, -40 dB, and -60 dB are available for pigtail style combiners. OZ Optics also supplies laser diode to fiber couplers with photodiodes. They are available in two configurations. In one setup, the photodiode acts as a monitor photodiode, measuring the reference power from the laser diode. The second setup instead uses the photodiode to detect light returning from the fiber. Such a setup is also known as an optical transceiver.