Nanosecond pulse generation in a passively Q-switched Yb-doped fiber laser by Cr/sup 4+/:YAG saturable absorber

Laroche, Mathieu; Gilles, H.; Girard, Sylvain; Passilly, Nicolas; Aı̈t-Ameur, Kamel

doi:10.1109/lpt.2006.871678

Cited by 50 publications

(37 citation statements)

References 11 publications

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“…The SBS process will supply an intensive and fast transient feedback to generate higher peak power Q-switched pulses much narrower than that by other Q-switches. With assistance of other technologies, such as hybrid Q switching or coherent combination, the peak power of SBS pulse can be raised to a higher level [6,7]. However, SBS Q-switched pulse has a drawback of repetition rate instability, which comes from the thermal noise incorporated in Brillouin scattering process, and has been observed experimentally [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…With assistance of other technologies, such as hybrid Q switching or coherent combination, the peak power of SBS pulse can be raised to a higher level [6,7]. However, SBS Q-switched pulse has a drawback of repetition rate instability, which comes from the thermal noise incorporated in Brillouin scattering process, and has been observed experimentally [4][5][6][7]. Reference 4 proposed that the enhancement the stabilization of the repetition rate can be achieved by modulating pump power, but did not present experiment data.…”

Section: Introductionmentioning

confidence: 99%

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Repetition rate stabilization of the SBS Q-switched fiber laser by external injection

Pan¹,

Li²,

Ye³

et al. 2009

Opt. Express

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Repetition rate fluctuation is one of the main drawbacks of the low-threshold stimulated Brillouin scattering (SBS) Q-switched fiber laser. A method to stabilize the repetition rate is proposed in this paper by injecting a square-wave modulated light. It is measured experimentally that variance of the repetition rate can be improved from ~20% to ~1% of the period. It is also found that effectiveness of the method depends on modulation frequency and duty cycle of the injection. Its working mechanism is analyzed qualitatively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Repetition rate stabilization of the SBS Q-switched fiber laser by external injection

Pan¹,

Li²,

Ye³

et al. 2009

Opt. Express

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“…Ybatoms can also act as sensitizers, absorbing and transferring energy to other emitting species such as erbium 7 . Long upper-state lifetimes and a small quantum defect further make Yb an excellent candidate for highly power-efficient Qswitched lasers 8 .…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects in Yb-doped optical fiber

Philip

Schneider

Simmons-Potter

et al. 2007

Fiber Lasers IV: Technology, Systems, and Applications

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Determination of the radiation response of doped-fiber laser materials, systems and components to relevant ionizing radiation fluxes is central to the prediction of long-term fiber-based laser performance/survivability in adverse and/or space-based environments. It is well known that optical elements that are placed into orbit around the Earth experience harsh radiation environments that originate from trapped-particle belts, cosmic rays, and solar events. Of particular interest to optical materials is the continuous flux of gamma photons that the materials encounter. Such radiation exposure commonly leads to the formation of color centers in a broad range of optical materials. Such color center formation gives rise to changes in optical transmission, loss and luminescent band structure, and, thus, impacts long-term optical device performance.In this paper we will present the results of our investigation of gamma-radiation-induced photodarkening on the passive optical transmittance of a number of ytterbium-(Yb-) doped optical fibers. We will discuss the evolution of the optical response of the fiber across the 1.0 to 1.6 micron wavelength window with increasing gamma exposure. Results indicate that these fibers exhibit reasonable radiation resistance to gamma exposures typical of a 5-year, low-earth-orbit environment. Maximum transmittance losses of less than 10% were observed for total gamma exposures of 2-5 krad (Si).

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“…수동형 Q-스위칭 레이저는 세기가 약 한 빛은 많은 손실을 겪고 세기가 강한 빛은 매우 작은 손실 을 갖는 포화흡수체의 포화흡수 효과에 의해서 동작된다. [5] 수동형 방법은 수동 소자를 이용하기 때문에 레이저의 구성 이 간단하고 가격이 저렴한 장점이 있다. 하지만 포화흡수체 의 물리적 조건에 의해서 레이저의 특성이 결정되기 때문에 한 번 구성된 레이저의 펄스 폭, 반복률, 첨두 파워, 펄스 파 형 과 같은 특성을 쉽게 조절 할 수 없는 제한이 있다.…”

Section: 서 론unclassified

Theoretical Analysis of Impact of Q-switch Rise Time on Output Pulse Performance in an Ytterbium-doped Actively Q-switched Fiber Laser

Jeon¹,

Lee²,

Lee³

2013

Korean Journal of Optics and Photonics

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A theoretical analysis of the impact of rise time of a Q-switch on the output pulse performance is carried out in an Ytterbium-doped actively Q-switched fiber laser. The finite difference time domain (FDTD) method is used to numerically simulate the Q-switched fiber laser. It is shown that stable Gaussian-like pulse shape can be generated when the Q-switch rise time is increased and pulse repetition rate is enlarged.

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Nanosecond pulse generation in a passively Q-switched Yb-doped fiber laser by Cr/sup 4+/:YAG saturable absorber

Cited by 50 publications

References 11 publications

Repetition rate stabilization of the SBS Q-switched fiber laser by external injection

Repetition rate stabilization of the SBS Q-switched fiber laser by external injection

Gamma radiation effects in Yb-doped optical fiber

Theoretical Analysis of Impact of Q-switch Rise Time on Output Pulse Performance in an Ytterbium-doped Actively Q-switched Fiber Laser

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