Fiber coupling is a method used to couple a laser's output into a fiber optic. We couple fibers directly to the laser module, not the diode. Depending on the laser assembly ordered, the module will contain a length of single mode or multimode fiber, along with the appropriate connectors. The standard fiber length is 1 meter, but longer fibers are available by special order.
A single mode fiber allows light to travel along a single path through the middle of the fiber core. This type of fiber is typically used for applications requiring especially high quality light output and is available as an option for many of our temperature controlled modules. For single mode fibers, we recommend a 4µm core for visible wavelengths and a 9µm core for IR wavelengths. Each of our fibers has a 3mm jacket. All single mode fibers are permanently attached to the module and can be terminated in an ST or FC connector.
A multimode fiber enables light waves to travel simultaneously along multiple paths within the core. Because the core of a multi-mode fiber is larger than that of a single mode, multimode fibers tend to be useful for less wavelength-sensitive applications. For multimode fiber applications, we offer 50µm, 62.5µm, 100µm, and 200+µm fibers. Each can be terminated in an FC or SMA connector. SMA is standard. Our F1 multimode fiber coupling option provides a removable fiber, while the remaining options below provide fibers that are permanently attached to the module.
For those in need of a fiber-coupled module with exceptional temperature control, our IQ4 unit is available. Our IQ4 will accommodate most fiber-coupled 14-pin butterfly, DIP, and DIL packages.
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