Demonstration of an etched cladding fiber Bragg grating filter with reduced tuning force requirement

Lyons, E.R.; Lee, H.P.

doi:10.1109/68.806868

Cited by 31 publications

(15 citation statements)

References 4 publications

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“…A range of techniques have been developed for etching optical fibers via the application of concentrated aqueous HF solutions [3,9,11,14,16]. For most of these reports, the fiber contained a FBG, so that when the cladding was removed the effective RI of the fiber core was affected by the RI of the medium surrounding the fiber core, and as noted above a change in the RI of the surrounding material induces a change in the Bragg wavelength.…”

Section: Existing Wet Chemical Etching Methods and Limitationsmentioning

confidence: 99%

“…In another approach, described by Iadicicco et al [15], the etched FBG can be utilized only within the device employed to etch the fiber. It has been noted that extra care is required in applying uniform tension during etching when the method involves using epoxy to hold the fiber so that it is immersed in a small well [11]. In this case, not enough tension can lead to a bow-shaped etched fiber with two distinct bent sections that are susceptible to breakage, while excessive tension can introduce chirps in the FBG spectrum.…”

Section: Existing Wet Chemical Etching Methods and Limitationsmentioning

confidence: 99%

“…Using a similar principle of operation, many other chemical and biological sensing solutions have been developed [1] where the cladding of a thinned fiber is replaced by specific materials sensitive to the particular measurand. In other applications, thinned optical fibers and FBGs are of interest for wavelength tuning [11].…”

Section: Introductionmentioning

confidence: 99%

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Uniformly thinned optical fibers produced via HF etching with spectral and microscopic verification

et al. 2012

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A method for producing uniformly thinned (etched) optical fibers is described, which can also be employed to etch optical fibers containing a Bragg grating (FBG) uniformly for evanescent-field-based sensing and other applications. Through a simple modification of this method, the fabrication of phase-shifted FBGs based on uneven etching is also shown. The critical role of how a fiber is secured is shown, and the success of the method is illustrated, by differential interference contrast microscopy images of uniformly etched FBGs. An etched FBG sensor for the monitoring of the refractive index of different glycerin solutions is demonstrated.

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Section: Existing Wet Chemical Etching Methods and Limitationsmentioning

confidence: 99%

Section: Existing Wet Chemical Etching Methods and Limitationsmentioning

confidence: 99%

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Uniformly thinned optical fibers produced via HF etching with spectral and microscopic verification

et al. 2012

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“…In a tunable FBG filter the sensitivity of FBGs to temperature or strain is exploited to create a tunable filter [1]. In our previous work, we have investigated the use of etched cladding FBG filters to reduce the force required for strain tuning a FBG by over an order of magnitude [2]. In this paper we investigate the tuning efficiency and modulation bandwidth of etched cladding FBGs that utilize temperature tuning of the filter.…”

Section: Introductionmentioning

confidence: 98%

Etched cladding tunable fiber Bragg grating filters integrated with Si V-grooves

et al. 2001

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We describe a novel electrically tunable fiber Bragg grating (FBG) filter with a chemically etched cladding and an evaporated metal coating on one side of the fiber. Wavelength tuning ranges up to 2.5nm with efficiencies greater than 8.5 nm/Watt have been demonstrated along with modulation bandwidths up to 14Hz. We have also demonstrated tuning efficiencies over 200nm/Watt for 30µm diameter etched cladding devices tuned under moderate vacuum conditions. Such tunable FBG filters have potential applications in dense wavelength division multiplexing (DWDM), optical signal processing, or in wavelength tunable fiber lasers. In our paper we investigate the tuning efficiency and modulation bandwidth of etched cladding FBGs integrated with Silicon V-grooves that utilize temperature tuning of the filter. By passing an electrical current through a thin metal coating deposited onto an etched cladding FBG, the temperature of the grating can be controlled to tune the spectral characteristics of the FBG. Additionally, to simplify the fabrication process, we evaporate the metal coating onto the etched FBG from only one side. This radially asymmetric metal coating is simpler to fabricate, since it does not require any mechanical fixture to rotate the fiber during metal deposition. The etched cladding FBG is placed in a Si V-groove that serves the multiple functions of holding the FBG during etching and evaporation, and also provides a simple and compact means for scaling up to arrays of tunable FBGs.

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“…FBGs in fibers of reduced cladding constitute a unique family of post-processed optical media that have found numerous applications in tunable devices and chemical sensing. For example, reducing the cladding diameter of a FBG containing fiber can reduce the tuning force requirements when used in tunable devices 10 . Etched fibers containing FBG are also used extensively as highly sensitive refractive index sensors and temperature independent chemical sensors 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Transverse strain sensor based on etched phase-shifted fiber Bragg gratings

Bal¹,

Brodzeli²,

Sidiroglou³

et al. 2010

SPIE Proceedings

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Demonstration of an etched cladding fiber Bragg grating filter with reduced tuning force requirement

Cited by 31 publications

References 4 publications

Uniformly thinned optical fibers produced via HF etching with spectral and microscopic verification

Uniformly thinned optical fibers produced via HF etching with spectral and microscopic verification

Etched cladding tunable fiber Bragg grating filters integrated with Si V-grooves

Transverse strain sensor based on etched phase-shifted fiber Bragg gratings

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