Inline Optical Isolator

This product has a function that passes light only from one direction and blocks light from the opposite direction.

Hybrid Optical Isolator

This is a product in which an isolator and an optical multiplex function have been combined.

Optical Filter Device

This product has a function that only passes light with arbitrary wavelengths.

Optical Circulator

This product has an optical circulating function.

Variable Optical Attenuator

This product has a function that allows adjustment of optical power levels.

Optical Components for Submarine Cable

High reliability optical components are realized with Kohoku's robust component technology proven for its submarine network components.

Polarization Maintaining Optical Fiber
Assembled with Capillary
and Metalized Fiber

In this product, a metal film is attached to the glass part of the polarized wave holding optical fiber and a glass capillary is attached to the tip.

Optical Fiber Array Assembled
with Hermetic Feedthrough

In this product, a metallic cylinder is attached to the center of the optical fiber and a glass capillary is attached to the tip.

Specially Assembled
Multi-channel Optical Fiber Array

This is a high-density assembled product of multi-channel optical fiber using ribbon fiber, etc.

Faraday Rotator

This is an optical crystal that changes the light state.

High-purity Silica Glass
Using a Slurry Cast Method

This is a silica glass part made by using a die.

Optical Fiber Preform
Using a Slurry Casting Method

This is a preform for specially shaped optical fiber made by using various types of dies.