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Nishi-Tokyo-shi, Japan

Cheng T.,Toyota Technological Institute | Deng D.,Toyota Technological Institute | Xue X.,Toyota Technological Institute | Matsumoto M.,Furukawa Denshi Co. | And 3 more authors.
Applied Optics | Year: 2015

We designed and fabricated a tellurite (76.5TeO2-6Bi2O3-11.5Li2O-6ZnO, mol. %) microstructured optical fiber (TMOF) with four air holes for widely tunable third-harmonic generation (THG). The loss of the TMOF is ∼0.2 dB/m at 1550 nm. Widely tunable THG from ∼567 to 902 nm is obtained when the TMOF is pumped by an optical parametric oscillator with the pump wavelength changing from ∼1700 to 2700 nm. The mechanism of THG in this work is further investigated through the third-harmonic signal pattern, which is due to the high nonlinearity of the TMOFand the high pump power, not from the phasematching process between the fundamental mode and the high-order TH mode. © 2015 Optical Society of America. Source


Cheng T.,Toyota Technological Institute | Tuan T.H.,Toyota Technological Institute | Liu L.,Toyota Technological Institute | Xue X.,Toyota Technological Institute | And 4 more authors.
Applied Physics Express | Year: 2016

We design and fabricate an all-solid chalcogenide microstructured optical fiber (MOF) with four rods in the cladding, in order to generate midinfrared (MIR) dispersive waves (DWs). The high-index background is made of AsSe2 glass, and the four low-index rods are made of As2S5 glass. This MOF has two zero-dispersive wavelengths: ∼3,720 and 4,230 nm. The propagation loss is ∼1.9 dB/m at 2,000 nm, and the nonlinear coefficient is ∼4 ∼ 103km-1W-1 at 3,000 nm. Using a pulse of ∼80MHz and ∼200 fs emitted from an optical parametric oscillator as the pump source, the resulting MIR DWs are investigated at different pump wavelengths. © 2016 The Japan Society of Applied Physics. Source


Cheng T.,Toyota Technological Institute | Nagasaka K.,Toyota Technological Institute | Tuan T.H.,Toyota Technological Institute | Xue X.,Toyota Technological Institute | And 4 more authors.
Optics Letters | Year: 2016

We experimentally demonstrate mid-infrared (MIR) supercontinuum (SC) generation spanning ∼2.0 to 15.1 μm in a 3 cm-long chalcogenide step-index fiber. The pump source is generated by the difference frequency generation with a pulse width of ∼170 fs, a repetition rate of ∼1000 Hz, and a wavelength range tunable from 2.4 to 11 μm. To the best of our knowledge, this is the broadest MIR SC generation observed so far in optical fibers. It facilitates fiber-based applications in sensing, medical, and biological imaging areas. © 2016 Optical Society of America. Source


Cheng T.,Toyota Technological Institute | Kanou Y.,Toyota Technological Institute | Xue X.,Toyota Technological Institute | Deng D.,Toyota Technological Institute | And 4 more authors.
Optics Express | Year: 2014

A novel AsSe2-As2S5hybrid MOF (HMOF) is designed and fabricated by the rod-in-tube drawing technique. The core is made from AsSe2glass and the cladding is made from As2S5glass. The loss is ∼1.2 dB/m at ∼3000 nm. Zero dispersion wavelength (ZDW) of the HMOF is ∼3380 nm. Supercontinuum (SC) generation in a 2 cm-long HMOF is investigated with the pump wavelengths of ∼3062, 3241 and 3389 nm from a tunable optical parametric oscillator (OPO) system. Broadband mid-infrared (MIR) SC generation with the spectrum from ∼1256 to 5400 nm is obtained with the peak power of ∼1337 kW at the wavelength of ∼3389 nm. © 2014 Optical Society of America. Source


Cheng T.,Toyota Technological Institute | Kanou Y.,Toyota Technological Institute | Deng D.,Toyota Technological Institute | Xue X.,Toyota Technological Institute | And 4 more authors.
Optics Express | Year: 2014

A hybrid four-hole AsSe2-As2S5 microstructured optical fiber (MOF) with a large refractive index difference is fabricated by the rod-intube drawing technique. The core and the cladding are made from the AsSe2 glass and As2S5 glass, respectively. The propagation loss is ∼1.8 dB/m and the nonlinear coefficient is ∼2.03 × 104 km-1W-1at 2000 nm. Raman scattering is observed in the normal dispersion regime when the fiber is pumped by a 2 μm mode-locked picosecond fiber laser. Additionally, soliton is generated in the anomalous dispersion regime when the fiber is pumped by an optical parametric oscillator (OPO) at the pump wavelength of ∼3000 nm. © 2014 Optical Society of America. Source

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