Wavelength Tunable Fiber Lens Based on Multimode Interference

Mohammed, Waleed S.; Mehta, Alok; Johnson, Eric

doi:10.1109/jlt.2004.824379

Cited by 294 publications

(139 citation statements)

References 8 publications

Supporting

Mentioning

134

Contrasting

Unclassified

Order By: Relevance

“…1 which is a schematic diagram of the minimum length required to this effect takes place, the mathematical expressions behind this effect are as followed. The field distribution at the end of the MMF segment of length z, can be written as (Mohammed et al, 2004) …”

Section: Multimode Interference Effectmentioning

confidence: 99%

See 1 more Smart Citation

Tunable Rare-Earth Doped Fiber Laser

Castillo-Guzman¹,

Selvas-Aguilar²

2012

Selected Topics on Optical Fiber Technology

View full text Add to dashboard Cite

Section: Multimode Interference Effectmentioning

confidence: 99%

“…Eq. (4) gives the relation between the mirror distance expression and the maximum coupling of light back into the SMF (Mohammed et al, 2004)…”

Section: Multimode Interference Effectmentioning

confidence: 99%

Tunable Rare-Earth Doped Fiber Laser

Castillo-Guzman¹,

Selvas-Aguilar²

2012

Selected Topics on Optical Fiber Technology

View full text Add to dashboard Cite

“…A modal propagation analysis (MPA) using cylindrical coordinates as in [7,8,12] LP modes can be excited because of the circular symmetry of the input field and assuming ideal alignment of the fibre axes of the SMF and the MMF [7,8,12]. Defining the field profile of…”

Section: Proposed Configuration and Its Designmentioning

confidence: 99%

“…a fiber lens, a displacement sensor, a refractometer, a bandpass filter and an edge filter [7][8][9][10][11]. Based on our previous investigation [11], this paper proposes and demonstrates a ratiometric wavelength monitor using two edge filters consisting of SMS fiber structures with opposite slope spectral responses.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric wavelength monitor based on singlemode‐multimode‐singlemode fiber structure

Hatta

Farrell

Wang

et al. 2008

Micro & Optical Tech Letters

View full text Add to dashboard Cite

An all-fiber ratiometric wavelength monitor for optical wavelength measurement is proposed and is investigated theoretically and experimentally. Two edge filters with opposite slope spectral responses based on singlemode-multimode-singlemode (SMS) fiber structures are developed. A ratiometric wavelength measurement system employing the developed SMS edge filters demonstrates a high discrimination range of 20.41 dB and a potential wavelength measurement resolution of 10 pm over a wavelength range from 1530 to 1560 nm. IntroductionA wavelength monitor is a key component for many optical systems such as multi-channel dense wavelength-division multiplexing (DWDM) optical communication systems and fibre Bragg grating (FBG) based optical sensing systems. A FBG-based optical sensing system requires a wavelength demodulation system capable of accurately estimating the wavelength shift in the reflected light from an FBG element induced by strain or temperature changes.Wavelength measurement or monitoring can be implemented using a ratiometric power measurement technique. A ratiometric wavelength monitor usually consists of a splitter with two outputs to which are attached an edge filter arm with a well defined spectral response and a reference arm. Alternatively, two edge filters arms with opposite slope spectral responses can be used. The use of two opposite slope edge filters can increase resolution of the ratiometric system [1]. Such a ratiometric wavelength monitor scheme converts the wavelength measurement into a signal intensity measurement. Compared with a wavelength-scanning-based active measurement scheme, it has the advantages of a simple configuration, the potential for high-speed measurement and the absence of mechanical movement. The main element of the ratiometric scheme, the edge filter, can be implemented by either a bulk thin filter [1], a fiber grating [2], biconical fiber couplers [3], or a bending fiber [4,5]. An all-fiber edge filter has several advantages by comparison to bulk filters, for example, ease of interconnection, mechanical stability and low polarization sensitivity [6].Singlemode-multimode and singlemode-multimode-singlemode (SMS) fiber structures have been investigated for use in several applications e.g. a fiber lens, a displacement sensor, a refractometer, a bandpass filter and an edge filter [7][8][9][10][11]. Based on our previous investigation [11], this paper proposes and demonstrates a ratiometric wavelength monitor using two edge filters consisting of SMS fiber structures with opposite slope spectral responses. This configuration has the advantage that it can achieve opposite slope spectral responses with a high

show abstract

“…Many techniques are based on multiplexing different FBGs or combining different types of sensors, such as hybrid FBG/Fizeau interferometer, hybrid FBG/long-period gratings and so on [1][2][3]. On the other hand, multimode fiber (MMF) based sensors [4][5][6][7] have attracted much attention recently because of their high sensitivity and low price. A step-index MMF-based temperature and strain sensor, a refractive index sensor and a curvature sensor based on MMF, and a strain and temperature sensor based on a graded-index (GI) MMF are all demonstrated.…”

Section: Introductionmentioning

confidence: 99%