All-fiber DFB laser operating at 28  μm

Bernier, Martin; Michaud-Belleau, Vincent; Levasseur, Simon; Fortin, Vincent; Genest, Jérôme; Vallée, Réal

doi:10.1364/ol.40.000081

Cited by 48 publications

(13 citation statements)

References 17 publications

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“…Alternatively, phase-shifted FBGs can be fabricated using infrared (IR) femtosecond (fs) lasers. The primary techniques in this case are based on point-by-point/line-by-line writing [6,14,15] and displacing a uniform phase mask during the inscription [16,17]. Uniform phase masks were also used to produce phase-shifted FBGs when i) a uniform FBG was overexposed in the center [18], ii) the central part of the fs-laser beam was blocked [19] and iii) a uniform FBG was written in a length of fiber that incorporates a fusion splice [20].…”

Section: Introductionmentioning

confidence: 99%

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

Hnatovsky¹,

Grobnic²,

Mihailov³

2018

Opt. Express

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Type II π-phase-shifted Bragg gratings stable up to ~1000°C are written inside a standard single mode silica optical fiber (SMF-28) with infrared femtosecond pulses and a special phase mask. Inscription through the protective polyimide fiber coating is also demonstrated. The birefringence of the Bragg gratings and, as a result, the polarization dependence of their spectra are strongly affected by the femtosecond laser polarization. Using optimized writing conditions, the full width at half maximum of the π-phase-shifted passband feature can be ~30 pm in transmission, while the polarization-dependent shift of its central wavelength can be less than 8 pm, for a 7 mm long grating structure. This makes such gratings a unique tool for high-resolution measurements of temperature, load and vibration in extreme temperature environments.

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Section: Introductionmentioning

confidence: 99%

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

Hnatovsky¹,

Grobnic²,

Mihailov³

2018

Opt. Express

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“…External amplification of these pulses with an Er 3 : fluoride fiber is also very promising for reaching the higher peak powers required for some applications such as supercontinuum generation [5]. Coherent spectral broadening of the laser output signal over more than one octave using, for example, a tapered chalcogenide fiber [22] combined with the recent demonstration of an active frequency reference operating near 3 μm [23] could provide the conditions to perform fully selfreferenced frequency comb spectroscopy in the mid-infrared [3,24].…”

mentioning

confidence: 99%

Femtosecond fiber lasers reach the mid-infrared

Duval¹,

Bernier²,

Fortin³

et al. 2015

Optica

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210

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“…The possibility of utilizing the phase-mask technique also for the inscription of more complex grating designs such as π-shifted uniform FBGs has been demonstrated by dithering the phase-mask during inscription which allowed for the demonstration of a single-frequency distributed feedback (DFB) fiber laser at 2.8 μm [42].…”

Section: Phase Mask Techniquementioning

confidence: 99%

Grating Inscription Into Fluoride Fibers: A Review

2019

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First demonstrated over four decades ago, fiber gratings, and in particular fiber Bragg gratings (FBGs), have become indispensable and ubiquitous components within fiber laser cavities as well as optical communication networks and sensor systems. Because of their overwhelming use, the bulk of published work to date has concentrated on fibers that are composed of silica-based glasses, yet those become virtually opaque at wavelengths above 2 μm, i.e., in the technically increasingly important mid-infrared part of the electromagnetic spectrum. Soft glass fluoride fibers on the other hand, in particular those composed of ZBLAN (abbreviation for ZrF 4-BaF 2-LaF 3-AlF 3-NaF), offer low-loss transmission out to wavelengths of up to almost 4 μm. However, while fiber manufacturing itself has now reached a high level of maturity, with passive fiber attenuation levels as low as 1 dB/km becoming commercially available, grating fabrication in these fibers remains challenging, and research into suitable inscription techniques is still a very active and ongoing scientific field. This review aims to provide an overview of work that has been done in this area to date with an emphasis on femtosecond-laser based fabrication methods.

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All-fiber DFB laser operating at 28 μm

Cited by 48 publications

References 17 publications

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

High-temperature stable π-phase-shifted fiber Bragg gratings inscribed using infrared femtosecond pulses and a phase mask

Femtosecond fiber lasers reach the mid-infrared

Grating Inscription Into Fluoride Fibers: A Review

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