Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

Escalante-Zarate, Luis; Barmenkov, Yuri O.; Kolpakov, Stanislav A.; Cruz, J.L.; Andrés, Miguel V.

doi:10.1364/oe.20.004397

Cited by 24 publications

(16 citation statements)

References 11 publications

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“…Among the amplifiers doped with rare earths, those made with fiber-optic doped with erbium and doped with ytterbium can be mentioned [10][11][12]. The optical fibers doped with erbium are the most used for the construction of this type of amplifiers, among other sensors and other applications [13][14][15][16]. The above due to its low cost compared to the ytterbium and because its amplification window coincides with the third transmission window of silica-based optical fibers [17].…”

Section: Optical Fiber Transmissionmentioning

confidence: 99%

Introductory Chapter: Optical Fibers

Imani¹,

Huerta-Cuéllar²

2020

Optical Fiber Applications

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Section: Optical Fiber Transmissionmentioning

confidence: 99%

Introductory Chapter: Optical Fibers

Imani¹,

Huerta-Cuéllar²

2020

Optical Fiber Applications

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“…Barmenkov et al experimentally explored the repetitive regimes of AQS in the context of chaos theory [1]. In addition, other numerous literatures including [5], attempted to explain the physical origins of MPP by tracing the dynamics of system or suggested some modifications to the laser cavity using extra components [8]. Amongst all of the methods, modification of modulator timing parameters such as the rise time (t r ), on time (t on ) and fall time (t f ) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Optimal Pulse-Shaping in Actively Q-Switched Ytterbium-Doped Fiber Lasers

2020

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In an actively Q-switched fiber laser (AQS-FL) a type of acousto-optic modulator (AOM) or (potentially) electro-optic modulator (EOM) controls the generation of output nanosecond wide pulses. An integrated Gaussian pulse shape is desirable in many applications such as material processing, microfabrication, ultrasound generation, gold photothermal therapy, etc. However, because of the system dynamics, generation of perfect Gaussian pulse shapes is not guaranteed in an AQS-FL, additionally designing the AQS-FL for a desired pulse peak and duration is an inverse problem which needs cumbersome trialerror efforts. We have developed a framework consisting of a rigorous FDM method plus a dedicated and innovative multi-objective genetic algorithm (GA) which assists the designer in achieving the desired Gaussian pulses within a reasonable time frame. The developed GA evolves the timing parameters of modulator plus the pump power and fiber length until the suitable goal is reached. To demonstrate the flexibility and design feasibility of our GA, three different single pulse and pulse train generation scenarios on a 7.5 m long Ytterbium-doped double clad fiber (YD-DCF) are examined to achieve the Gaussian,150 Wand 200 W peak power, 250 ns and 300 ns width pulses. To the best of our knowledge, it is the first implementation of an intelligent algorithm for optimizing the output pulse of an AQS-FL. It is worth noting that depending on the fiber host material and modulator specifications, much higher peak powers and different pulse durations are feasible, furthermore in case of utilizing the AOM, the pertaining limitations and feasibility are considered.

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“…The active Q-switching technique for laser pulses generation requires the use of an external modulator to obtain pulsed laser operation. In contrast to passive Q-switched lasers, when an active Q-switching technique is applied, the pulse characteristics can be modified independently of the pump power by using an electronic pulses generator, allowing the proper controlling of the laser pulses for the required laser application [14][15][16][17]. In this regard, the use of EYDCF to design active Q-switched fiber lasers has been underexploited.…”

Section: Introductionmentioning

confidence: 99%

Compact Narrow Linewidth Actively Q-Switched Er–Yb Double-Clad Fiber Laser

Posada-Ramírez

Durán-Sánchez

Álvarez-Tamayo

et al. 2017

Fibers

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Actively Q-switched laser operation of a narrow linewidth compact fiber laser based on an Er-Yb double-clad fiber is presented. The laser linewidth as a function of the repetition rate and the Q-switched pulses characteristics for different pump powers are experimentally analyzed. Stable Q-switched laser operation with spectral laser linewidth of 73 pm in a repetition rate range from 90 to 270 kHz is obtained. The minimum pulse duration of 178 ns, maximum peak power of 30.5 W, and maximum pulse energy of 5.4 µJ are observed. The maximum average power reached is 1.1 W.

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Smart Q-switching for single-pulse generation in an erbium-doped fiber laser

Cited by 24 publications

References 11 publications

Introductory Chapter: Optical Fibers

Introductory Chapter: Optical Fibers

Optimal Pulse-Shaping in Actively Q-Switched Ytterbium-Doped Fiber Lasers

Compact Narrow Linewidth Actively Q-Switched Er–Yb Double-Clad Fiber Laser

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