33 / 53
Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 95
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
N
onlinear optical generation in photonic crystal fiber (PCF) can afford tunable radiation in non-conventional wavelength band
that conventional laser source can not emit. During the nonlinear optical generation process, the situation always occurs that
high power is confined in very small core region which leads to large gradient distribution of mode field. Hence tightly trapped
acoustic wave in the cross-section direction is ready to be generated due to electrostriction. And it is named as guided acoustic
wave Brillouin scattering (GAWBS) or forward Brillouin scattering. Recently, GAWBS in PCF pumped at 1.5 µm band or 1.8 µm
band has been investigated in depth. However GAWBS pumped at 1060 nm band has not been reported yet. Parametric optical
sources based on PCF pumped at 1060 nm band have shown its potential in the biological imaging application due to much larger
tunability bandwidth compared with traditional laser source in this band. The GAWBS generation in PCF in this band need to be
investigated in details since it is an unavoidable problem in the study of parametric light source operating in 1060 nm band. Here
we investigate the GAWBS generation in PCF pumped at 1060 nmband for the first time to the best of our knowledge. A homemade
PCF with small core diameter of about 2.4 µm and large air filling fraction in the cladding is used as optical-acoustic interaction
medium. A Sagnac loop including a section of PCF in a asymmetric configuration is used to convert the phase modulation of light
wave by the generated acoustic wave to intensity modulation. A homemade mode-locked Ytterbium doped fiber laser is used as
the pump source. The output from the Sagnac loop is measured by a high speed real time oscilloscope. The measurement shows
generation of GAWBS with the frequency of 1.23 GHz and lifetime of 120 ns.
ysg@tsinghua.edu.cnForward Brillouin scattering in photonic crystal
fiber stimulated by 1 µm band light source
Sigang Yang, Yi Yang, Yan Xie, Minghua Chen, Shizhong Xie
Tsinghua National Laboratory for Information Science and Technology (TNList), Department of
Electronic Engineering, Tsinghua University, China
Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-003