When circularly polarized light is reflected, its propagation direction reverses, changing left-circular polarization to right-circular polarization and vice versa. Therefore, the same polarizer that produces circular polarization of the incident beam will block the return beam with an isolation of at least 99.8 percent.
Achieving optical isolation using Meadowlark's circular polarizers requires that a given reflection be specular and that there is no medium intervening between the reflector and optical insulation to cause significant depolarization or polarization modification.
Optical isolators provide industrial lasers with immunity from back-reflection, thereby improving the signal to noise ratio for laser diode manufacturer based industrial transmitters. This is especially important for high data rate transceivers and transponders, or those devices requiring long span lengths between professional transceiver pairs. All of our isolators are based on dichroic polarizing glass and Faraday rotating crystals for highest performance. These devices are available in a single stage, 1.5 stages, or double stages, with multiple stages providing progressively higher isolation.
LightPath offers isolators in various form factors including: Cylindrical, Surface-Mount, and Sub-Mount. In addition, we manufacture isolators with either an epoxy-free optical path or with a laminated core. The primary benefits of our approach to manufacturing include reduced costs as a result of higher yields, throughput and product consistency as a result of automation. LightPath is capable of delivering a total solution to its OEM customers, from prototype and development contracting through high-volume production.
