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Optical Engineering

High-dynamic-range high-optical-isolation wavelength-sensitive thin film filter-based variable fiber optic attenuator
Author(s): Sarun Sumriddetchkajorn; Kosom Chaitavon
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Paper Abstract

A wavelength-sensitive variable fiber optic attenuator (VFOA) is introduced by incorporating the movable optical mirror with a fixed desired thin film filter (TF) in a compact in-line reflective architecture. Our TF-based wavelength-sensitive VFOA features low component count, high attenuation dynamic range, and high optical isolation. Experimental proof of concept using an off-the-shelf measured 1545.71-nm TF and a mechanically movable mirror shows a 4.64-dB optical loss, and a low polarization-dependent loss of 0.12 dB at the output port. A high optical attenuation dynamic range of >43 dB with a better than 30-dB optical isolation is obtained. Several proposed reflective wavelength-sensitive TF-based VFOAs can also be cascaded to form a low-cost, compact, multiwavelength amplitude controller.

Paper Details

Date Published: 1 March 2006
PDF: 5 pages
Opt. Eng. 45(3) 035004 doi: 10.1117/1.2185499
Published in: Optical Engineering Volume 45, Issue 3
Show Author Affiliations
Sarun Sumriddetchkajorn, NECTEC (Thailand)
Kosom Chaitavon, NECTEC (Thailand)

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