Low-Noise Narrow-Linewidth Fiber Laser at 1550 nm (June 2003)

Spiegelberg, Christine; Geng, Jihong; Hu, Yile; Kaneda, Yushi; Jiang, Shibin; Peyghambarian, Nasser

doi:10.1109/jlt.2003.822208

Cited by 296 publications

(100 citation statements)

References 11 publications

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“…At the same time, Thulium-doped fibre lasers (TDFL) are becoming interesting topic of research subjects for many applications. TDF generates broader emission spectrum covering near infrared region including 2 microns region [8]- [10].…”

Section: Introductionmentioning

confidence: 99%

Q-Switched Ultrafast TDFL Using MWCNTs-SA at 2 µm Region

Ahmad¹,

Latiff²,

Zakaria³

et al. 2014

IJCCE

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Abstract-We demonstrate an ultrafast TDFL Q-switched pulse in 2 µm wavelength using multi-walled carbon nanotubes (MWCNTs) as passive saturable absorber (SA). MWCNTs film is sandwiched between two fibre connectors or patch cords after deposited with index matching gel on the fibre ferrules. Thulium-doped fibre was pumped using 1552 nm source in the ring cavity. The repetition rate for the pulses can be tuned from 13.33 kHz to 21.07 kHz by varying the pump power from 307.5 mW to 371.4 mW. At the maximum power, the pulse generated energy of 87.34 nJ with full-width at half maximum (FHWM) of 8.21 µs.Index Terms-Multi-walled carbon nanotubes, passive saturabe absorber, Q-switching.

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Section: Introductionmentioning

confidence: 99%

Q-Switched Ultrafast TDFL Using MWCNTs-SA at 2 µm Region

Ahmad¹,

Latiff²,

Zakaria³

et al. 2014

IJCCE

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“…Both bleaching processes are found effective to fully erase the UV-induced PD loss. Rare-earth-doped phosphate glass (without silica) is a popular medium for high-power amplifiers and compact fiber lasers because of its higher solubility of rare-earth elements, relative to silica glass [1,2]. An additional benefit of this material is the absence of pump-induced photodarkening (PD) at near-infrared (NIR) wavelengths [3].…”

mentioning

confidence: 99%

Deep UV-induced near-infrared photodarkening of Er/Yb-doped and undoped phosphate fibers

Hofmann

Schülzgen

et al. 2013

Opt. Lett.

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Photodarkening (PD) of Er/Yb-doped and undoped phosphate fibers caused by pulsed 193 nm irradiation from an ArF excimer laser to form Bragg grating mirrors is investigated. Doped and undoped phosphate fibers exhibit the same level of significant UV-induced PD loss, which is associated with the formation of a color center band at 467 nm. The UV-induced absorption extends into the NIR and creates a loss on the order of 1 dB∕cm across the C-band. Photo-bleaching by a high-power supercontinuum source, and thermal-bleaching processes are performed on photodarkened samples. Both bleaching processes are found effective to fully erase the UV-induced PD loss. Rare-earth-doped phosphate glass (without silica) is a popular medium for high-power amplifiers and compact fiber lasers because of its higher solubility of rare-earth elements, relative to silica glass [1,2]. An additional benefit of this material is the absence of pump-induced photodarkening (PD) at near-infrared (NIR) wavelengths [3]. In this Letter, detailed results are presented about significant NIR PD caused by short wavelength ultraviolet (UV) irradiation at 193 nm, used to form Bragg grating laser mirrors in phosphate fibers, and about ways to eliminate this PD. The PD effect, referring to light irradiation-induced absorption, has been studied in many kinds of rareearth-doped optical fibers [4,5], mostly in Yb-doped silica and phospho-silica optical fibers, because the NIR darkening loss induced by high-power pumping severely degrades the output power and long-term reliability of high-power fiber lasers [6][7][8][9]. In addition to PD induced by pump light at 980 nm, PD was also observed to occur under irradiation at 193 and 488 nm [10,11]. Although the exact mechanism of the PD in Yb-doped silica fiber is still under debate, light-induced loss is commonly attributed to the formation of color centers by photoionization via either single-or multi-photon absorption processes, depending on the irradiation wavelength [6,[11][12][13][14]. The peak absorption wavelength observed in different glasses depends on the species of color centers generated and ranges from the visible (VIS) to the UV. Invariably, all color center absorption bands show a long tail extending into the NIR, and hence, a noticeable loss is generated at the pump and signal wavelengths of Yb-doped fiber lasers. In all these silica glasses, however, the absorption decreases gradually further into the NIR spectrum and becomes negligible in the 1550 nm telecommunication window. Hence, the PD effect has not been considered detrimental to Er-doped fiber lasers operating around 1550 nm, even with Yb codopants in the fiber.For higher power, shorter length fiber lasers made from phosphate glass with integrated Bragg grating mirrors, however, the situation is different. Since phosphate fibers lack photosensitivity in the 244 nm spectral range, commonly used to form fiber Bragg gratings, irradiation with intense 193 nm light from excimer lasers is required [15].In this Letter, it is shown that such irradi...

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“…This greatly increases the pump absorption, leading to increase in the laser efficiency and output power. Up to 200 mW at 1550 nm has been obtained with Er/Yb codoped phosphate glass fiber [9].…”

Section: Introductionmentioning

confidence: 99%

High-temperature-resistant distributed Bragg reflector fiber laser written in Er/Yb co-doped fiber

Guan¹,

Zhang²,

Wang³

et al. 2008

Opt. Express

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Abstract:We present a high-temperature-resistant distributed Bragg reflector fiber laser photowritten in Er/Yb codoped phosphosilicate fiber that is capable of long-term operation at 500 o C. Highly saturated Bragg gratings are directly inscribed into the Er/Yb fiber without hydrogen loading by using a 193 nm excimer laser and phase mask method. After annealing at elevated temperature, the remained gratings are strong enough for laser oscillation. The laser operates in robust single mode with output power more than 1 dBm and signal-to-noise ratio better than 70 dB over the entire temperature range from room temperature to 500 o C.

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Low-Noise Narrow-Linewidth Fiber Laser at 1550 nm (June 2003)

Cited by 296 publications

References 11 publications

Q-Switched Ultrafast TDFL Using MWCNTs-SA at 2 µm Region

Q-Switched Ultrafast TDFL Using MWCNTs-SA at 2 µm Region

Deep UV-induced near-infrared photodarkening of Er/Yb-doped and undoped phosphate fibers

High-temperature-resistant distributed Bragg reflector fiber laser written in Er/Yb co-doped fiber

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