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Passively Q-switched fibre laser based on interaction of evanescent field in optical microfibre with graphene-oxide saturable absorber

Jaddoa M.F., Faruki M.J., Razak M.Z.A., Azzuhri S.R. and Ahmad H.

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Abstract. We have developed and approved experimentally a passively Q-switched erbium-doped fibre laser. It is based on the saturable absorption of graphene oxide solution deposited around a microfibre waveguide. The microfibre is fabricated using a standard flame-brushing technique. By controlling the pump power in the cavity, the fibre laser can produce microsecond Q-switched pulses at 1529 nm with the maximum repetition rate 53.47 kHz. With a pumping power of 105.98 mW at 980 nm, each of the laser pulses has the energy about 0.78 nJ and the maximum output power is 42.15 μW

Keywords: microfibre, saturable absorber, Q-switched, fibre laser

PACS: 42.55.Wd
UDC: 535.374:621.375.8
Ukr. J. Phys. Opt. 17 58-64
doi: 10.3116/16091833/17/2/58/2016
Received: 07.03.2016

Анотація. Запропоновано та апробовано лазер з пасивною модуляцією добротності на основі оптичного волокна, легованого ербієм. Робота лазера базується на насиченому поглинанні в оксиді графену, нанесеному навколо мікроволокна. Мікроволокно обробляли з використанням стандартної полум’яно-очищувальної технології. За умови контролю потужності нагнітання в резонаторі волоконний лазер може індукувати мікросекундні імпульси з модуляцією добротності на довжині хвилі 1529 нм з максимальною повторюваністю 53,47 кГц. Кожен імпульс мав енергію біля 0,78 нДж , а максимальна вихідна потужність становила 42.15 мкВт при нагнітанні лазерним діодом потужністю 105,98 мВт на довжині хвилі 980 нм..
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