Very broad reflection bandwidth (44 nm) chirped fibre gratings and narrow bandpass filters produced by the use of an amplitude mask

Farries, M.C.; Sugden, Kate; Reid, D.C.J.; Bennion, I.; Molony, A.; Goodwin, M.J.

doi:10.1049/el:19940609

Cited by 69 publications

(10 citation statements)

References 10 publications

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“…The CFBGs, fabricated using the dissimilar interfering wavefront method described in Ref. [8], have a central wavelength of 1 547nm, a bandwidth of 32nm and a reflectivity of 99%.…”

Section: Experimental Systemmentioning

confidence: 99%

Temperature-strain discrimination using a wavelength-division-multiplexed chirped FBG/EFPI sensor system

et al. 2001

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A novel fibre-optic sensing system used for temperature-strain discrimination is presented. This system consists of an extrinsic Fabry-Perot interferometric sensor (EFPI) and a chirped in-fibre Bragg grating (CFBG) in series. The EFPI and the CFBG are wavelength-division-multiplexed to provide strain and temperature information, respectively. The wavelength-shift of the CFBG induced by temperature change at the 1 .55tm region is interrogated with an intensity-based scheme, allowing fast measurement of temperature. The cavity length change of the EFPI is measured at the 1 .3 jim region, allowing strain to be measured without cross-talk from the temperature sensor, i.e. the CFBG. Experimental results show that the achieved accuracies for strain and temperature measurement are and respectively.

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“…The CFBGs, fabricated using the dissimilar interfering wavefront method described in Ref. [8], have a central wavelength of 1 547nm, a bandwidth of 32nm and a reflectivity of 99%.…”

Section: Experimental Systemmentioning

confidence: 99%

Temperature-strain discrimination using a wavelength-division-multiplexed chirped FBG/EFPI sensor system

et al. 2001

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“…Utilisation of the chirped grating structure has been a key factor in our experiments. Chirped fibre gratings have been successfully produced by using the of dissimilar wavefronts in an UV two-beam side-exposure holographic system [16]. Although, in principle, arbitrary chirp rates can be realised using this configuration, the combination of large chirp rate and high reflectivity is limited in practice by the obtainable UV-induced index change in fibre.…”

Section: Introductionmentioning

confidence: 99%

<title>Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system</title>

Zhang

Harper

Sugden

et al. 1996

Fiber Optic Components and Optical Communication

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We report here fabrication of highly efficient in-fibre grating bandpass filters using the established UVside-exposure technique. Various combinations of passband/stopband and transmission/rejection of single-and multi-channel filters have been produced in hydrogenated standard telecom, high Ge-doped and B/Ge-codoped fibres. Up to >60dB rejection stopbands ranging from -2nm to 55nm, and passbands with O.O2nm-3nm linewidths and transmissivity up to >90% have been achieved with these devices. By concatenating several structures, a bandpass filter has been demonstrated with a combination of a 0. l6nm passband centred in a -35nm stopband, representing the highest reported finesse of 220 for any multi-nanometer stopband filter.We also report the first application of a grating bandpass filter for suppressing timing jitter in soliton propagation system, enabling transmission of lops solitons over a distance of 2700km.

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“…10 Chirped BFGs are also obtained by varying the state of the surrounding medium-for example, by changing the temperature, 11 the bends of the OFs, 12 etc. Chirped BFGs obtained by using CLs are distinguished by simplicity and processability.…”

Section: Introductionmentioning

confidence: 99%

Modelling interferometric apparatus for recording variable-period Bragg gratings in an optical fiber

2015

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Very broad reflection bandwidth (44 nm) chirped fibre gratings and narrow bandpass filters produced by the use of an amplitude mask

Cited by 69 publications

References 10 publications

Temperature-strain discrimination using a wavelength-division-multiplexed chirped FBG/EFPI sensor system

Temperature-strain discrimination using a wavelength-division-multiplexed chirped FBG/EFPI sensor system

<title>Fabrication of highly efficient grating band-pass filters and their applications in soliton propagation system</title>

Modelling interferometric apparatus for recording variable-period Bragg gratings in an optical fiber

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