This article is cited in 21 papers

Extreme light fields and their applications

Femtosecond fibre laser stabilisation to an optical frequency standard using a KTP electro-optic crystal

B. N. Nyushkov^ab, V. S. Pivtsov^bc, N. A. Koliada^b, A. B. Kaplun^d, A. B. Meshalkin<sup>d

a</sup> Novosibirsk State University
^b Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk
^c Novosibirsk State Technical University
^d S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences

Abstract: A miniature intracavity KTP-based electro-optic phase modulator has been developed which can be used for effective stabilisation of an optical frequency comb of a femtosecond erbiumdoped fibre laser to an optical frequency standard. The use of such an electro-optic modulator (EOM) has made it possible to extend the working frequency band of a phase-locked loop system for laser stabilisation to several hundred kilohertz. We demonstrate that the KTP-based EOM is sufficiently sensitive even at a small optical length, which allows it to be readily integrated into cavities of femtosecond fibre lasers with high mode frequency spacings (over 100 MHz).

Keywords: femtosecond fibre laser, femtosecond frequency synthesiser, optical frequency standard, electro-optic crystal, electrooptic modulator, phase-locking, frequency stabilisation.

PACS: 42.55.Wd, 42.62.Eh, 42.65.Re, 42.70.Mp, 78.20.Jq

Received: 29.01.2015
Revised: 06.02.2015

 English version: Quantum Electronics, 2015, 45:5, 486–491

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