A low-temperature plasma-enhanced chemical vapor deposition grown germanium (Ge) thin-film is emp... more A low-temperature plasma-enhanced chemical vapor deposition grown germanium (Ge) thin-film is employed as a nonlinear saturable absorber (SA). This Ge SA can passively mode-lock the erbium-doped fiber laser (EDFL) for soliton generation at a central wavelength of 1600 nm. The lift-off and transfer of the Ge film synthesized upon the SiO2/Si substrate are performed by buffered oxide etching and direct imprinting. The Ge film with a thickness of 200 nm exhibits its Raman peak at 297 cm−1, which both the nanocrystalline and polycrystalline Ge phases contribute to. In addition, the Ge thin-film is somewhat oxidized but still provides two primary crystal phases at the (111) and (311) orientations with corresponding diffraction ring radii of 0.317 and 0.173 nm, respectively. The nanocrystalline structure at (111) orientation with a corresponding d-spacing of 0.319 nm is also observed. The linear and nonlinear transmittances of the Ge thin-film are measured to show its self-amplitude modul...
We observed the depolarized guided acoustic-wave Brillouin scattering (GAWBS) spectrum in a highl... more We observed the depolarized guided acoustic-wave Brillouin scattering (GAWBS) spectrum in a highly nonlinear fibre with partially side-stripped polymer coating. The linewidth of the GAWBS spectral line at 941 MHz was measured to be 6.4 MHz, which was 0.9 times that of a coated fibre.
2019 Asia Communications and Photonics Conference (ACP), 2019
We demonstrate a laser cavity which can output dual-wavelength mode-locked fiber laser and wavele... more We demonstrate a laser cavity which can output dual-wavelength mode-locked fiber laser and wavelength tunable mode-locked fiber laser by using short length Lyot-filter. The dual-wavelength output centers at 1540 nm and 1564 nm and the tunable range of the single-wavelength mode-locked laser is from 1532 nm to 1564 nm.
We present an ultra-fast saturable absorber device based on single-walled carbon nanotubes. The s... more We present an ultra-fast saturable absorber device based on single-walled carbon nanotubes. The saturable absorbing effect was observed using 1 ps optical pulses at 80 GHz. This device possesses promising characteristics for applications such as a noise suppressor or a mode-locker.
A low-temperature plasma-enhanced chemical vapor deposition grown germanium (Ge) thin-film is emp... more A low-temperature plasma-enhanced chemical vapor deposition grown germanium (Ge) thin-film is employed as a nonlinear saturable absorber (SA). This Ge SA can passively mode-lock the erbium-doped fiber laser (EDFL) for soliton generation at a central wavelength of 1600 nm. The lift-off and transfer of the Ge film synthesized upon the SiO2/Si substrate are performed by buffered oxide etching and direct imprinting. The Ge film with a thickness of 200 nm exhibits its Raman peak at 297 cm−1, which both the nanocrystalline and polycrystalline Ge phases contribute to. In addition, the Ge thin-film is somewhat oxidized but still provides two primary crystal phases at the (111) and (311) orientations with corresponding diffraction ring radii of 0.317 and 0.173 nm, respectively. The nanocrystalline structure at (111) orientation with a corresponding d-spacing of 0.319 nm is also observed. The linear and nonlinear transmittances of the Ge thin-film are measured to show its self-amplitude modul...
We observed the depolarized guided acoustic-wave Brillouin scattering (GAWBS) spectrum in a highl... more We observed the depolarized guided acoustic-wave Brillouin scattering (GAWBS) spectrum in a highly nonlinear fibre with partially side-stripped polymer coating. The linewidth of the GAWBS spectral line at 941 MHz was measured to be 6.4 MHz, which was 0.9 times that of a coated fibre.
2019 Asia Communications and Photonics Conference (ACP), 2019
We demonstrate a laser cavity which can output dual-wavelength mode-locked fiber laser and wavele... more We demonstrate a laser cavity which can output dual-wavelength mode-locked fiber laser and wavelength tunable mode-locked fiber laser by using short length Lyot-filter. The dual-wavelength output centers at 1540 nm and 1564 nm and the tunable range of the single-wavelength mode-locked laser is from 1532 nm to 1564 nm.
We present an ultra-fast saturable absorber device based on single-walled carbon nanotubes. The s... more We present an ultra-fast saturable absorber device based on single-walled carbon nanotubes. The saturable absorbing effect was observed using 1 ps optical pulses at 80 GHz. This device possesses promising characteristics for applications such as a noise suppressor or a mode-locker.
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Papers by Sze Yun Set