Tunable wavelength division multiplexing channel isolation filter based on dual chirped long-period fiber gratings

Tiwari, Umesh and Tripathi, S.M. and Thyagarajan, Krishna and Mangalpady, R.S. and Mishra, Vandana and Jain, S.C. and Singh, Nahar and Kapur, Pawan (2011) Tunable wavelength division multiplexing channel isolation filter based on dual chirped long-period fiber gratings. Optics Letters, 36 (19). pp. 3747-3749. ISSN 0146-9592 (print) 1539-4794 (online)

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Abstract

We propose and demonstrate a wavelength tunable wavelength division multiplexing channel isolation filter based on two concatenated chirped long-period fiber gratings (LPGs). An intergrating space (IGS), deliberately introduced between the two gratings, provides an extra phase difference between the core and cladding modes. Changing this phase by heating the IGS without affecting the gratings tunes the channels. A theoretical account of the filter action is also presented and the results are found to be in excellent agreement with the experiments. Unlike the filters based on normal concatenated chirped LPGs without an IGS, the current filter shows a linear tuning over an increased spectral range.

Item Type: Article
Subjects: CSIO > Optics
Depositing User: Ms. J Shrivastav
Date Deposited: 23 Apr 2012 11:38
Last Modified: 23 Apr 2012 11:38
URI: http://csioir.csio.res.in/id/eprint/263

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