Open AccessGeneration of octave-spanning super-continuum in tapered single mode fibre pumped by femtosecond Yb:YCOB laser
Author(s) -
Yulei Jia,
Zheng Zhu,
Hainian Han,
Wenlong Tian,
Xiutao Yang,
Long Zhang,
Zhiyi Wei
Publication year - 2015
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.64.054206
Subject(s) - supercontinuum , materials science , femtosecond , optics , laser , octave (electronics) , fiber laser , frequency comb , optoelectronics , wavelength , physics , photonic crystal fiber
It is a pivotal step in the measurement of carrier-envelope phase offset frequency in optical femtosecond frequency combs that a stable octave-spanning super-continuum spectrum is generated. In this paper, a home-made Yb:YCOB femtosecond laser pulse is led into a tapered fiber in which some nonlinear effects like self pulse modulation are generated and the four-wave mixing is made to broaden a spectrum to more than one octave-spanning. A Yb:YCOB oscillator emits 130 fs, 620 mW and 76.8 MHz laser pulses, the center wavelength at 1052 nm. Such pulses are focused into a tapered single-mode fiber, and then more than one octave-spanning supercontinuum from 550 nm to 1350 nm has been produced. The coupling efficiency can reach 52% when 323 mW SC laser pulses are detected. Based on the experimental result, a new optical comb will be built with the Yb:YCOB solid state laser as the light source.