An efficient electrically tunable etched cladding fiber Bragg grating filter tested under vacuum

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

doi:10.1109/68.920759

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…The fiber has very low thermal mass, which contribute to fast switching time. Tuning efficiency and speed could be additionally improved by etching the fiber cladding or/and its enclosing in a vacuum housing [9]. To achieve uniform heating of AFBG it is necessary to pump from both sides.…”

Section: Resultsmentioning

confidence: 99%

Light-controlled Reconfigurable Fiber Bragg Gratings Written in Attenuation Fiber

Ćorić

Chatton

Luchessa

et al. 2007

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference

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A novel type of light controlled fiber Bragg gratings written in attenuation fiber is demonstrated. The spectral reconfiguration can be controlled by the pump power, the pumping configuration, the grating position and the fiber attenuation. IntroductionTunable, reconfigurable and actively controlled fiber Bragg gratings (FBG) are one of the key components for the agile optical networks and sensing systems. Most common tuning methods include piezo-electrical [1], mechanical [2] and, thermal actuation [3,4]. Thermal tuning is usually achieved using a thin metallic film, deposited on the fiber around the FBG and heated using externally supplied electrical power. Electrical heating requires deposition of a metallic coating, external electrical power supply and cabling, which altogether limits range of application, decreases device lifetime, and could prevent application in harsh environment. Ideally, spectral shaping and reconfiguration of the properties of optical gratings should be done via optical means. The idea of all-optical control was demonstrated using Er/Yb doped fiber and appropriate pump light. Index changes were induced based on nonlinear effect [5] or non-radiative absorption [6]. Recently, Chen et al. [7] demonstrated an optically tunable FBG where the grating is heated by pump light absorbed in the metallic coating. In addition to applications in telecommunications, actively optically controlled FBG could play an important role in the sensing area [8]. Here, we present a novel all-optically reconfigurable optical fiber grating, without mechanical and electrical components. The idea is based on the concept of writing an FBG in an attenuation fiber. We called this new family of Bragg gratings -attenuation fiber Bragg gratings (AFBG). Using the high power light source (at a wavelength outside the grating resonance), the FBG written inside the attenuation fiber is heated and actively controlled using optical means only. Non-uniform absorption of the pump power along the fiber induces nonuniform temperature distribution. Using optical low-coherence reflectometry we measure the temperature profile along the grating with high spatial distribution. Due to the simple design and heating of the grating with light propagating along the same fiber, this device offers a simple solution for remotely light-controlled FBGs.

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Section: Resultsmentioning

confidence: 99%

Light-controlled Reconfigurable Fiber Bragg Gratings Written in Attenuation Fiber

Ćorić

Chatton

Luchessa

et al. 2007

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference

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“…By reducing the cladding diameter of FBG, the tension tuning force can be lowered by over an order of magnitude. Reflection wavelength can be shifted either by controlling the effective refractive index of the waveguide [54] or by stretching the grating mechanically [67,68]. Wavelength tuning by bending control of asymmetric single mode grating fiber fabricated by anisotropic plasma etching has been proposed by Kumazaki et al [69].…”

Section: Techniques For Enhanced Sensitivitiesmentioning

confidence: 99%

Enhanced transverse wavelength tuning of fiber Bragg gratings for sensing applications

Paul¹

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Fiber Bragg grating (FBG) based strain sensors have found a variety of applications in the last two decades. Most of these applications utilize the wavelength tuning of FBGs through an axially induced strain because of the high axial load sensitivity in comparison to lateral loading. However, wavelength tuning through lateral or transverse loading is attractive for applications like structural health monitoring, damage detection etc, owing to the flexibility in mounting or embedding the sensor. The wavelength tuning of the FBG sensors through lateral loading has the advantage of easy surface mounting, ruggedness, long term stability, structural integrity and more resistant to vibration. However, the potentials of wavelength tuning through lateral loading are yet to be utilized by overcoming its inherent limitations of low lateral pressure sensitivity, narrow tuning range and stress induced birefringence. In order to understand these problems, various studies regarding the lateral loading process are performed initially. These studies include analysis of influence of the pressurizing media (or contact media) and contact conditions on the wavelength response characteristics of the FBGs. It is found that the material of the pressurizing media, its configuration and the contact friction play major roles in lateral pressure tuning (LPT) process and significant enhancement in performance can be achieved by optimizing these parameters. The lateral pressure sensitivity is high for a contact media with low value of Young's modulus. The sensitivity also increases with both the thickness of the contact plate and the contact friction between the fiber and the contact media. However, using an optimized contact media always may not be feasible in all working conditions. ni

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Demonstration of high extinction ratio modal interference in a two-mode fiber and its applications for all-fiber comb filter and high-temperature sensor

Lin

Tseng

et al. 2005

Optics Communications

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An efficient electrically tunable etched cladding fiber Bragg grating filter tested under vacuum

Cited by 8 publications

References 12 publications

Light-controlled Reconfigurable Fiber Bragg Gratings Written in Attenuation Fiber

Light-controlled Reconfigurable Fiber Bragg Gratings Written in Attenuation Fiber

Enhanced transverse wavelength tuning of fiber Bragg gratings for sensing applications

Demonstration of high extinction ratio modal interference in a two-mode fiber and its applications for all-fiber comb filter and high-temperature sensor

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