98 research outputs found
On-chip two-octave supercontinuum generation by enhancing self-steepening of optical pulses
Dramatic advances in supercontinuum generation have been made recently using
photonic crystal fibers, but it is quite challenging to obtain an
octave-spanning supercontinuum on a chip, partially because of strong
dispersion in high-index-contrast nonlinear integrated waveguides. We show by
simulation that extremely flat and low dispersion can be achieved in silicon
nitride slot waveguides over a wavelength band of 500 nm. Different from
previously reported supercontinua that were generated either by higher-order
soliton fission in anomalous dispersion regime or by self phase modulation in
normal dispersion regime, a two-octave supercontinuum from 630 to 2650 nm (360
THz in total) can be generated by greatly enhancing self-steepening in
nonlinear pulse propagation in almost zero dispersion regime, when an optical
shock as short as 3 fs is formed, which enables on-chip ultra-wide-band
applications
Mode-locked picosecond pulse generation from an octave-spanning supercontinuum
We generate mode-locked picosecond pulses near 1110 nm by spectrally slicing
and reamplifying an octave-spanning supercontinuum source pumped at 1550 nm.
The 1110 nm pulses are near transform-limited, with 1.7 ps duration over their
1.2 nm bandwidth, and exhibit high interpulse coherence. Both the
supercontinuum source and the pulse synthesis system are implemented completely
in fiber. The versatile source construction suggests that pulse synthesis from
sliced supercontinuum may be a useful technique across the 1000 - 2000 nm
wavelength range
Morphology and luminescence characteristics of yttriumdisilicate doped with yb<sup>3+</sup>, er<sup>3+</sup>(ho<sup>3+</sup>) and tm<sup>3+</sup>
[No abstract available
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