Double-clad Fiber Couplers

Description

The double-clad fiber couplers developed by Castor Optics combine single-mode light transmission with multimode light transfer. Light transmission in the core is quasi-lossless from Port A to Port S, and again from Port S to Port A (see diagram). In the inner cladding of the double-clad fiber, light transfer occurs from the inner cladding of Port S to the multimode branch called Port B in couplers designed for light collection. Bi-directional double-clad fiber couplers allow for efficient injection (Port B to Port S) AND collection (Port S to Port B).

Specifications

Single-mode Central Wavelength:	530, 780, 1060 or 1300 nm
Single-mode Insertion Loss:	< 0.5 dB
Multimode Transfer:	≥ 60%
Multimode Spectral Range:	400-1600 nm

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Applications

Optical Coherence Tomography (OCT)
Fluorescence Imaging
Confocal Microscopy
Spectroscopy
Surface Plasmon Resonance (SPR) Sensing
Speckle-Free Single-Fiber Endoscopy
LIDAR

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Ships from:: Canada
Sold by:: Castor Optics Inc
On FindLight:: since 2021

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Frequently Asked Questions

What are double-clad fiber couplers?

Double-clad fiber couplers combine single-mode light transmission with multimode light transfer.

What are the applications of double-clad fiber couplers?

Double-clad fiber couplers are used in Optical Coherence Tomography (OCT), Fluorescence Imaging, Confocal Microscopy, Spectroscopy, Surface Plasmon Resonance (SPR) Sensing, Speckle-Free Single-Fiber Endoscopy, and LIDAR.

What is the difference between extraction couplers and bidirectional couplers?

Extraction couplers allow for efficient multimode transfer from Port S to Port B, while bidirectional couplers can be used for both extraction (Port S to Port B) and injection (Port B to Port S) of multimode light.

What are the specifications of the double-clad fiber couplers?

The specifications include insertion loss, multimode transfer efficiency, maximum power level, port configuration, fiber lead length, and dimensions of the ports.

Are there any limitations or considerations for using double-clad fiber couplers?

Photodarkening may occur at lower wavelengths, and performance in the water absorption region centered at 1388 nm is not guaranteed. Coupler performance under high-power conditions should be determined within the user's setup.

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