Journal
OPTICS COMMUNICATIONS
Volume 283, Issue 7, Pages 1291-1295Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2009.11.020
Keywords
Temperature dependence; Edge filter; Multimode fiber
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Funding
- National Natural Science Foundation of China [NSFC 60777038]
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Temperature dependence of an edge filter based on singlemode-multimocle-singlemode (SMS) fiber structure is investigated numerically and experimentally. The experimental results and numerical results are in good agreement within an operational temperature range from 10 degrees C to 40 degrees C. It is found that the thermo-optic coefficient (TOC) has a more significant effect on the temperature dependence of an SMS edge filter compared to the thermal expansion coefficient (TEC). In the ratiometric wavelength measurement using two SMS edge filters, a small temperature variation can induce the ratio variation and in turn the wavelength measurement error. It is found the SMS edge filter's response to both wavelength and temperature is linear. It is proposed that self-monitoring of temperature can be carried out using an updated ratiometric scheme. Self-monitoring of the temperature reduces temperature induced wavelength error to +/- 0.7 pm at 1545 nm, regardless of the ambient temperature variation. (C) 2009 Elsevier B.V. All rights reserved.
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