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About Optical Isolators
Optical isolators are passive optical devices that allow light to be transmitted in only one direction. They are most often used to prevent any light from reflecting back down the fiber, as this light would enter the source and cause backscattering and feedback problems. Optical feedback degrades signal-to-noise ratio and consequently bit-error rate. Ideally an isolator would pass all light in one direction and block all light in the reverse direction.
There are two major classifications of optical isolators: inline isolators (fiber optic isolators) and free space isolators. Inline fiber optical isolators are designed in pigtail fashion. That is to say that they come with built-in fiber optic cable and connectors so that they may be integrated directly into a fiber optic system. Free space isolators, by contrast, do not have an integral connection system. They must be directly mounted to the object that needs isolation.
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Part Numbers for Optical Isolators
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| OPTICAL ISOLATOR | netCOMPONENTS | Not Provided | Not Provided | Not Provided |
| PS8741-F3-A | Digi-Key | NEC | Isolators | PHOTOCOUPLER OPTICAL DAA 16-S |
| PS8741-A | Digi-Key | NEC | Isolators | PHOTOCOUPLER OPTICAL DAA 16-S |
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