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Optica Publishing Group
  • Optical Fiber Communications Conference
  • OSA Trends in Optics and Photonics (Optica Publishing Group, 2002),
  • paper WC6

A Loss Tunable Long-Period Fiber Gratings on Corrugated Silicon with on-chip Microheater and Temperature Sensor

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Abstract

Fiber long-period gratings (LPGs) which couple light from the core mode to cladding modes over a narrow wavelength band have attracted considerable interest recently for applications such as band rejection filters,1 mode converters,2 and spectral equalizer.3 More recently, interests have shifted to tunable LPGs for dynamic spectral filtering applications in WDM networks. Both wavelength tuned and loss tuned LPGs have been demonstrated by depositing a thin film micro-heater directly on a LPG,4,5 and by applying an external stress on an etched corrugated single mode fiber (SMF),6 respectively. More recently, a CO2-laser-induced LPG with independent loss and wavelength tuning was realized by controlling the axial orientation of the fiber relative to the bending direction.7 In this paper, we present a novel thermally-controlled LPG by bonding a cladding etched SMF to a corrugated Si fixture with pre-fabricated thin-film microheater and temperature sensors. Loss tuning as large as 20 dB is demonstrated at input power of 14 W (Fig. 2(c)) The attractiveness of this new approach is two fold: the entire fixture is processed using standard microfabrication techniques, and this approach can potentially lead to per element control of the LPG filter.

© 2002 Optical Society of America

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