Specialty Yb fiber amplifier for microchip Nd laser: Towards ∼1-mJ/1-ns output at kHz-range repetition rate

Kir’yanov, Alexander V.; Klimentov, S. M.; Mel’nikov, Igor V.; Шестаков, А. В.

doi:10.1016/j.optcom.2009.08.062

Cited by 8 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, laser systems tend to be complex and prone to electromagnetic interference. However, one interesting developing trend is the miniaturization and simplification of laser systems as exemplified by diode and fiber lasers where the pulse-repetition rate can be substantially improved [9], [10]. Fiber lasers of today can deliver infrared nanosecond pulses of several millijoules with kilohertz pulse repetition frequency.…”

Section: Introductionmentioning

confidence: 99%

Laser Triggering of Spark Gap Switches

Larsson

Yap

et al. 2014

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Switching time jitter is an important property to consider when selecting a closing switch for a pulsed-power system, and time-precise triggering may be achieved through the use of lasers. For a midgap laser-triggered spark gap, three different physical mechanisms can be used: nonresonant multiphoton ionization, resonant-enhanced multiphoton ionization, and electron tunneling. The first one is traditionally used, whereas the latter two are more exploratory. In this paper, the traditional method is employed to study the delay time and time jitter of a laser-triggered spark gap using an Nd:YAG laser at 1064 and 532 nm, where the laser pulse is guided via an optical fiber to the spark gap; the laser pulse energy and the applied voltage have been varied with nitrogen as the working gas. One draw back of the current laser triggering technology compared with other triggering techniques is that laser systems are more complex and prone to electromagnetic interference. Another downside is that the pulse-repetition rate is poor. A discussion about the development of lasers to overcome these issues is included, together with a deliberation about the pros and cons of the two exploratory methods of laser triggering.

show abstract

Section: Introductionmentioning

confidence: 99%

Laser Triggering of Spark Gap Switches

Larsson

Yap

et al. 2014

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…To date, such fibers have been extensively explored, covering a wide range of possible applications (see e.g. [19][20][21][22][23][24][25][26]), but as far as we know no comprehensive studies regarding the SBS-SQS regime's features in an YDFL based on a GTW-YDF assembly have been made.…”

Section: Introductionmentioning

confidence: 99%

An experimental analysis of self-Q-switching via stimulated Brillouin scattering in an ytterbium doped fiber laser

2013

View full text Add to dashboard Cite

An experimental study of self-Q-switching (SQS) in an ytterbium doped fiber laser (YDFL) arranged using a twin-core GTWave assembly is reported. The main mechanisms that initiate, amplify, and limit SQS pulses in amplitude are revealed to be stimulated Brillouin and Raman scattering (SBS/SRS) and Yb3+ amplified spontaneous emission. The parameters featuring SQS oscillation in terms of efficiency and stability of pulsing are found to be intra-cavity loss and feedback strength. An analysis of the YDFL SQS regime’s features—pulsing time series, optical and RF spectra, amplitude and timing jitter—is provided for the two experimental situations: (i) when SQS pulsing stochastically intermits with regular active Q-switching pulses, given by the action of an intra-cavity acousto-optical modulator, and (ii) when a pure SQS mode is intentionally implemented in the YDFL without a modulator. The close relationship of the processes involved and SQS parameters in these two circumstances is demonstrated. Giant pulses with durations of 70–80 ns are shown to be generated at threshold intra-cavity powers of around 250 W (SBS threshold) and limited at approximately 2 kW of peak power (SRS threshold). At SBS-SQS, we show that at high values of intra-cavity loss, and thus reduced feedback, the amplitude and timing jitter values can be reduced to 5% and 7%, respectively.

show abstract

“…Что касается волоконно-оптической технологии, явление самоинтерференции изначально использовалось для оптимизации передачи по оптоволоконным линиям. Позже были предложены более гибкие функциональные оптические цельноволоконные устройства, такие как перестраиваемые волоконные линзы [9], полосовые фильтры [10], волоконные лазеры с многомодовым отрезком на конце одномодового волокна для подавления отражения [11][12][13][14], а также широкий спектр датчиков и перестраиваемых лазеров [15]. MMIустройства на основе оптического волокна имеют широкий спектр сенсорных приложений, поскольку они чувствительны к показателю преломления, температуре, смещению и деформации.…”

unclassified