Click here to view the Optical Isolators section of our 2008 Product Catalog.

Optical Isolators provide lasers with immunity from back-reflection, thereby improving the signal to noise ratio for laser diode based transmitters. This is especially important for high data rate transceivers and transponders, or those devices requiring long span lengths between 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.

• Metro, access, long haul and hybrid fiber coax
• High volume wafer-scale manufacturing
• High isolation, low insertion loss
• Square form factor for ease of mounting
• One stage, 1.5 stage and double stage isolation

Many of today's transmitters require optical isolators to eliminate back reflections and feedback in the laser diode. This feedback and noise creates jitters in the system. LightPath's Tx™ Isolators are manufactured in a very economical and scalable process. By utilizing a wafer based platform you can be assured of premium performance at an outstanding value.

LightPath's Tx™ Isolators are manufactured with a latched garnet, which eliminates the need and extra cost associated with traditional magnet. Latched garnet has the orientation of its magnetic dipoles frozen by poling in an external magnetic field at an elevated temperature.

• Small form factor
• Alignment of one optical component
• Diffraction limited performance
• Typical isolation > 40 dB (1.5 stage)

Oasis™ provides a compact solution by combining both an aspheric lens and an isolator. Built as a monolithic design, it offers diffraction limited performance optics along with outstanding isolation. The designs are ideal for small form factor laser diodes in both single and multi-channel configurations.

The Surface Mount configuration offers smaller form factors and exceptional value. The typical Surface Mount Oasis™ contains a 0.55 NA Finite Conjugate lens that couples a laser directly into a single mode fiber.

The Micro Fixture Bench configuration offers a stainless steel holder, which can be easily mounted and aligned with standard pick and place equipment and then soldered or welded into the package. It contains a 0.8 NA or 0.6 NA collimating lens, perfect for collimating most laser diodes. The isolator offers a choice of single, 1.5 and double stages of isolation dependent on your requirements.