Features:

• Proven design and manufacture
• Variety of standard packaging options
• 375 nm to 2050 nm
• Single mode, multimode or polarization maintaining fiber
• Rugged design

Applications:

• Fiber Optic Communications
• Optical Alignment Systems
• Process Control
• Optical Sensor Applications
• Medical Apparatus
• Imaging Systems
• Test and measurement systems
• OCT systemss

Product Description:

OZ Optics offers a complete line of laser diode to fiber couplers, offering optimum coupling in a small, rugged package. They 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 400nm to greater than 2050nm. These source couplers work with multimode, singlemode, and polarization maintaining fiber. One advantage of the design is should the diode ever fail, it can easily be replaced while reusing the rest of the optics. The device can then be realigned for optimum coupling. There are two versions of tilt adjustable laser diode to fiber couplers - receptacle style couplers, and pigtail style couplers. Pigtail style laser diode to fiber couplers are offered with the fiber pigtailed directly onto the coupler. The pigtail style laser diode to fiber coupler provides 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. The standard diameter package is 0.79" in diameter. This size fits almost all standard laser diode packages. The larger 1.3" diameter housing provides best coupling efficiencies as it permits a wider selection of coupling optics. This housing size is also used with large diode case sizes, such as TO-3 (H1) package sizes. A smaller 0.59" diameter housing is available for diode can sizes 9.0mm in diameter or smaller. For diodes with can diameters of 5.6mm or less, a miniature 0.5" diameter tilt adjustable housing is possible.

One misconception about tilt adjustable laser diode couplers is the belief that the number of tilt and locking screws make the coupler sensitive to temperature or vibration. In fact, 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 a 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. The housing diameter is typically 10mm. Coupling efficiency into singlemode and multimode fibers is typically 10 percent and 35 percent, respectively.

A variety of options are available for laser diode to fiber couplers. One such option is a coupler with a built in isolator. Isolators can reduce the effects of backreflection by up to 60dB. This is very useful for applications where the intensity and wavelength stability of the output light from the diode are critical. Another option is a blocking screw to attenuate the output beam. This allows the user to precisely control the output power entering the fiber, without having to change the diode current. Laser diode to fiber couplers with polarizers or polarization rotators in the middle are also available.

Datasheet