Characterization of single-mode optical fiber filters

Lam, D. K. W.; Garside, B. K.

doi:10.1364/ao.20.000440

Cited by 171 publications

(47 citation statements)

References 6 publications

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“…Lam et al [4] showed that photosensitivity at 488 nm is a two-photon absorption process, Following this, Meltz et al [5] suggested that germanosilicate glass should be highly photosensitive at the corresponding one-photon wavelength of 244nm. They externally exposed the side of a germanium-doped fibre to two interfering plane waves at 244 nm.…”

Section: Photosensitivity In Glassmentioning

confidence: 99%

Catching light in its own trap

Monro

Sterke

Poladian

2001

Journal of Modern Optics

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Self-written structures form dynamically in photosensitive media, in which the refractive index changes permanently under the influence of light that propagates through it. Self-written waveguides have been observed in a variety of materials including glasses and polymers. Detailed theoretical analysis of self-writing in germanosilicate glasses is in good agreement with experiments. We review recent experimental and theoretical progress in this field and indicate likely areas of future progress.

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Section: Photosensitivity In Glassmentioning

confidence: 99%

Catching light in its own trap

Monro

Sterke

Poladian

2001

Journal of Modern Optics

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“…FBGs play an important role in spectral linewidth control of fiber lasers. The reflectivity of the uniform grating with constant modulation amplitude and constant period can be obtained using the coupled mode theory [10], given by the following formula: where R is the coefficient that determines the grating strength (R = 1 for strong grating and R = 0.5 for weak grating), Dn is the refractive index modulation, k B is the central wavelength of operation (Bragg wavelength), and N is the number of grating lines along the whole length of the grating.…”

Section: Polarization-independent Circulatormentioning

confidence: 99%

Main Optical Components for Fiber Laser/Amplifier Design

Ter-Mikirtychev

2013

Springer Series in Optical Sciences

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The first reported theoretical analysis and prediction of laser action based on a semiconductor diode was published in 1959 in the USSR [1]. The first operation of a semiconductor laser (also called a ''diode laser'' or ''laser diode'') was reported in 1962 in the USA [2]. Semiconductor lasers play a very important role in the fiber laser field. Therefore, this section provides a detailed description of the physical processes that take place in these laser devices.Unlike isolated atoms and molecules (and even some laser optical centers in doped dielectrics), semiconductors demonstrate wide energy bands. These bands are separated by a bandgap (Fig. 9.1). Typical values of the bandgap of semiconductor materials for the most commonly used and commercially available diode lasers are on the order of a few electron volts. Under certain excitation conditions, such as injecting an electrical current, optical excitation, or heating, electrons from the valence band can move from the valence band to the conduction band after absorbing energy by an excitation process. As a result of this interband electron transition, a pair of charge carriers can be created (i.e., electrons in the conduction band and holes in the valence band), which is called an electron-hole pair. If an electron undergoes reverse transition (i.e., from the conduction band to the valence band), the process is called electron-hole recombination. The result of this interband recombination is usually an extraction of energy that was received during the excitation process.In equilibrium, electron-hole pairs can be created and recombined as a result of thermal diffusion and spontaneous emission of photons. Thermal equilibrium of electrons and holes, in this case, produces a certain concentration of electrons in the conduction band and holes in the valence band. Note that electrons are fermions (their spin equals 1/2) and thus follow so-called Fermi-Dirac statistics. Therefore, a probability of the electron occupying a certain level with energy E at V. Ter-Mikirtychev,

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“…The grating reflectivity with constant amplitude modulation and period can be described as follow [4]:…”

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confidence: 99%

Tuneable Photonic Fiber Bragg Grating for Magnetic Field Sensor

Al-Thahapy

Al-Dergazly

2016

Preprint

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Abstract:In this project, four of fibers Bragg gratings were fabricated by injecting different volumes of liquids (star line Glass Mechanix optical adhesive material, olive oil diluted with ethanol) into the hollow core fiber. The amplitude splitting interferometric technique with a high resolution specially designed translation stage was used for the fabrication process. The fabrication was done using ultraviolet laser operated at wavelength 405nm. The fabricated Bragg length of the four fibers is equal to 3.8 cm. The results presented fiber Bragg grating (FBG) with successful fabrication at 653.3 nm Bragg reflected wavelength.

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Characterization of single-mode optical fiber filters

Cited by 171 publications

References 6 publications

Catching light in its own trap

Catching light in its own trap

Main Optical Components for Fiber Laser/Amplifier Design

Tuneable Photonic Fiber Bragg Grating for Magnetic Field Sensor

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