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3 October 1994 Tunable "continuous fiber" bandpass filters
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We report on the realization and investigation of a novel `continuous fiber' device structure whose spectral response is that of a comb-type bandpass filter. Filter response was investigated as a function of overlay refractive index and thickness for both oil and solid-state overlays. Passband linewidths (FWHM) of < 5 nm, insertion losses of 0.5 dB and free spectral range 25 - 250 nm have been demonstrated. The filter response was tuned over a 45 nm range by variation of the overlay superstrate index. In addition, the use of lithium niobate as the overlay offers the potential for electro-optic tuning and this topic is currently being investigated.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kevin J. McCallion, Walter Johnstone, and Brian Culshaw "Tunable "continuous fiber" bandpass filters", Proc. SPIE 2289, Doped Fiber Devices and Systems, (3 October 1994);

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