Excited-state absorption as a source of nonlinear thermo-induced lensing and
self-Q-switching in an all-fiber Erbium laser

Kir’yanov, Alexander V.; Il'ichev, Nikolai N; Barmenkov, Yuri O.

doi:10.1002/lapl.200310048

Cited by 37 publications

(24 citation statements)

References 11 publications

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“…[1][2][3][4][5][6][7][8][9]. For a long time the presence of the clustered erbium ions and their behaviour as a saturable absorber has been considered as the only possible mechanism responsible for the self-pulsing [1][2][3][4][5][6]9].…”

Section: Introductionmentioning

confidence: 99%

“…Application of such fibres as an active media for HC EDFLs resulted in auto-oscillations with two characteristic frequencies of about 10 kHz and 100 kHz and two threshold pump powers. The first pump power was slightly above and the second one was 10 times exceeding the first threshold [7,8]. Thus, unlike pair-clusters, alternative approaches to self-pulsing in HC EDFLs have to be developed.…”

Section: Introductionmentioning

confidence: 99%

“…[8] that pump-to-signal noise transfer can play a significant role in appearance of low frequency self-pulsing. In addition, power-dependent thermo-induced lensing has been suggested as a mechanism for high-frequency (100 kHz) self-pulsing [7].…”

Section: Introductionmentioning

confidence: 99%

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Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Sergeyev¹,

O'Mahoney²,

Popov³

et al. 2010

Open Physics

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Abstract:We report results on experimental and theoretical characterisation of self-pulsing in high concentration erbium doped fibre laser which is free from erbium clusters. Unlike previous models of self-pulsing accounting for pair-induced quenching (PIQ) on the clustered erbium ions, new model has been developed with accounting for statistical nature of the excitation migration and upconversion and resonance-like pumpto-signal intensity noise transfer. The obtained results are in a good agreement with the experimental data. PACS

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Sergeyev¹,

O'Mahoney²,

Popov³

et al. 2010

Open Physics

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“…One can point out their relatively low efficiency comparing to ytterbium ͑Yb 3+ ͒-doped fiber lasers and amplifiers, and the tendency to possess a relatively high-level noise or even self-pulsing. [6][7][8][9][10] One of the selfpulsing sources in EDFL, as it stems from a series of previous works, [11][12][13][14][15][16][17] is the presence of excited-state absorption ͑ESA͒ in Er 3+ . ESA is immanent to the Er 3+ system while an Er 3+ -doped silica fiber ͑EDF͒ is pumped through its groundstate absorption ͑GSA͒ bands, centered at ϳ977 and ϳ1531 nm.…”

Section: Introductionmentioning

confidence: 99%

Excited-state absorption in erbium-doped silica fiber with simultaneous excitation at 977 and 1531 nm

Barmenkov

Kir’yanov

Guzmán-Chávez

et al. 2009

Journal of Applied Physics

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We report a study of the excited-state absorption ͑ESA͒ in erbium-doped silica fiber ͑EDF͒ pumped at 977 nm, when the fiber is simultaneously excited by signal radiation at 1531 nm. We show, both experimentally and theoretically, that ESA efficiency at 977 nm gets strongly enhanced only in the presence of signal power. Experimentally, this conclusion is supported through the detection of upconversion emission, a "fingerprint" of the ESA process, and through the measurements of the EDF nonlinear transmission coefficient for the pump wavelength, which is sensitive to the ESA value. It is shown that the experimental data are precisely modeled with an advanced five-level Er 3+ model developed for the EDF.

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“…On the other hand, one cannot exclude as a possible alternative or additional source of Q-switching in YFL the nonlinear thermo-lensing effect, which has been recently reported to result in giant-pulse operation of an Erbiumdoped all-fiber laser [21]. Finally notice that the SQS regime is stable in YFL if the active YF properties are not seriously deteriorated in time-domain because of the photo-darkening effect [22,23].…”

mentioning

confidence: 99%

Self-Q-switched Ytterbium-doped all-fiber laser

Kir’yanov

Barmenkov

2006

Laser Phys. Lett.

Self Cite

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Abstract:We report an experimental realization and study of a self-Q-switched diode-pumped all-fiber Ytterbium laser. Possible mechanisms leading to establishing of self-Q-switching in the laser are discussed. Pulsed Ytterbium-doped fiber lasers operating near 1 µm are currently of increased interest as the devices potentially applicable in different areas of technology, medicine, basic research, etc. Rather than mode-locked Ytterbium fiber lasers generating ultra-short pulses (of femto-or pico-second duration), Q-switched Ytterbium fiber lasers oscillate normally pulses of nano-or submicrosecond duration ("giant pulses"). Usually the giant-pulse regimes can be realized in Ytterbium fiber lasers applying the Q-switching techniques conventional for bulk lasers, using as Q-switches acousto-or electro-optical elements, or solid-state saturable absorbers [1][2][3][4][5]. Apparently, the integrated fiber-bulk architecture of such laser schemes is a disadvantage in majority of applications. That is why implementation of Q-switched all-fiber Ytterbium lasers generating stable and powerful short pulses becomes an important point of current researches. To date, only a couple of actively Q-switched all-fiber Ytterbium laser designs have been proposed [6,7]. Meanwhile, the Q-switching arrangements in these lasers are complicate and expensive: As in all actively Q-switched lasers, additional electronic and optical circuits are needed to be incorporated in a laser scheme. So, more attention is paid now to develop passively Q-switched Ytterbium all-fiber lasers as an alternative to the actively Q-switched ones. The passive Qswitching methods to realize such lasers [8][9][10][11] have obvious potential advantages -the simplicity of implementation, low cost, and insensitivity to the environmental influences. However, there are also very few designs for passively Q-switched all-fiber Ytterbium lasers. Virtually in all these lasers the Brillouin or Raman scattering are exploited as the switching mechanisms [8][9][10]. The main drawback of the mentioned lasers is their quite instable operation that seems to stem from the stochastic nature of the Q-switching nonlinear scatterings, while giant pulses generated are quite short (nanoseconds) and powerful. An-

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Excited-state absorption as a source of nonlinear thermo-induced lensing and self-Q-switching in an all-fiber Erbium laser

Abstract: A modeling of an all-fiber self-Q-switched Erbium laser is developed, implying that the mechanism of self-Q-switching is the power-dependent thermo-induced lensing in Erbium fiber that stems from the excited-state absorption at the laser wavelength.

Cited by 37 publications

References 11 publications

Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Upconversion assisted self-pulsing in a high-concentration erbium doped fibre laser

Excited-state absorption in erbium-doped silica fiber with simultaneous excitation at 977 and 1531 nm

Self-Q-switched Ytterbium-doped all-fiber laser

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