Simple design for singlemode high power CW fiber laser using multimode high NA fiber

Morasse, Bertrand; Châtigny, Stéphane; Desrosiers, Cynthia; Gagnon, Éric; Lapointe, Marc-André; Sandro, Jean-Philippe de

doi:10.1117/12.807164

Cited by 10 publications

(2 citation statements)

References 21 publications

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“…В результате обзора литературы найдены схемы лазеров с близкими к необходимым параметрами излучения [1], [2]. Определена общая концепция построения схемы -«задающий генератор-усилитель» (рис.…”

Section: оптическая схема лазераunclassified

Compact pulse-periodicytterbium fiber laser with high energy

Исаев¹,

Kolegov²,

Akulinin³

et al. 2018

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Российский федеральный ядерный центр-Всероссийский научно-исследовательский институт технической физики им. акад. Е.И. Забабахина, Снежинск, Россия МАЛОГАБАРИТНЫЙ ИМПУЛЬСНО-ПЕРИОДИЧЕСКИЙ ИТТЕРБИЕВЫЙ ВОЛОКОННЫЙ ЛАЗЕР С ВЫСОКОЙ ЭНЕРГИЕЙ Разработан компактный импульсно-периодический волоконный лазер с длительностью импульса ~2,4 нс, частотой следования импульсов 11 кГц, номинальной энергией в импульсе ~180 мкДж и длиной волны генерации 1061,6 нм. Ключевые слова: импульсно-периодический волоконный лазер, иттербиевое активное волокно.

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Section: оптическая схема лазераunclassified

Compact pulse-periodicytterbium fiber laser with high energy

Исаев¹,

Kolegov²,

Akulinin³

et al. 2018

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“…As the core of conventional LMA fibers gets larger and the numerical aperture smaller, preserving near single-mode guidance becomes challenging as the waveguide is supporting an increasing number of modes and the effective-index space collapses, making intermodal coupling between fundamental and higherorder modes (HOMs) difficult to avoid [3][4] . Besides, differential bending loss between fundamental mode and HOMs vanishes as the propagation constants get closer, making mode discrimination by coiling the fiber less practical.…”

Section: Introductionmentioning

confidence: 99%

Yb-doped large mode area fibers with depressed clad and dopant confinement

et al. 2016

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Large mode area fibers with depressed-index cladding layer and confinement of rare-earth dopants can provide effective suppression of high-order modes. A polarization-maintaining Yb-doped double-clad fiber with 35/250 µm core/clad diameter has been fabricated from conventional methods according to this design. The fiber which has an effective mode area close to 500 µm 2 yields near diffraction-limited output with beam quality factor M 2 close to 1.1 when tested as a power amplifier with a coherent seed light source. Beam pointing measurements provide further evidence for near single-mode behavior as the pointing fluctuations are shown to be negligible once the fiber is coiled to a given diameter.

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