The Experts below are selected from a list of 5334 Experts worldwide ranked by ideXlab platform
Kenneth K. Y. Wong - One of the best experts on this subject based on the ideXlab platform.
-
fiber Optical Parametric Amplifier with high speed swept pump
IEEE Photonics Technology Letters, 2011Co-Authors: Chi Zhang, P. C. Chui, Kevin K. Tsia, Kim K. Y. Cheung, Kenneth K. Y. WongAbstract:We experimentally demonstrate and characterize a high-speed frequency-swept pump in a fiber-Optical Parametric Amplifier (FOPA). The high-speed swept pump is achieved with the swept rate as high as 78 MHz by a technique called dispersive Fourier transformation (DFT), which circumvents the fundamental speed limitation shown in the conventional swept-sources based on the cavity configurations. Based on such swept pump FOPA, the idler can be generated with a wavelength range twice the pump bandwidth. Such an all-Optical approach offers an order-of-magnitude higher swept rate and thus lends itself to many applications such as high-speed signal processing and Optical imaging.
-
millimeter wave uwb signal generation via frequency up conversion using fiber Optical Parametric Amplifier
IEEE Photonics Technology Letters, 2009Co-Authors: Yu Liang, Kenneth K. Y. WongAbstract:We propose and demonstrate a novel approach to generate millimeter-wave (MMW) ultra-wideband (UWB) signal via frequency up-conversion using fiber Optical Parametric Amplifier (OPA). The baseband UWB signal is amplified by a high-repetition-rate pulsed pump and generates many sidebands separated by the modulation frequency of the pump. By selecting two or three of the sidebands and beating in the photodetector, we can obtain an up-converted signal in the MMW band. In our experiment, we have successfully demonstrated UWB signal up-conversion from 3 to ~ 19 GHz with 18-dB Optical gain using fiber OPA.
-
High-Sensitivity Optical PreAmplifier for WDM Systems Using an Optical Parametric Amplifier
IEEE Photonics Technology Letters, 2009Co-Authors: Yu Liang, P. C. Chui, Jia Li, Kenneth K. Y. WongAbstract:We propose and demonstrate a novel preAmplifier to improve receiver sensitivity for a 10-Gb/s return-to-zero on-off keying format by using a fiber Optical Parametric Amplifier. Receiver sensitivity can reach down to -42 dBm at bit-error rate = 10-9. This sensitivity is only 1.1 dB off the quantum limit. The crosstalk issue is also investigated for this dual-end detection scheme in a wavelength-division-multiplexing system.
-
Wide-Band Generation of Picosecond Pulse Using Fiber Optical Parametric Amplifier and Oscillator
IEEE Journal of Quantum Electronics, 2009Co-Authors: Yue Zhou, P. C. Chui, Kim K. Y. Cheung, Sigang Yang, Kenneth K. Y. WongAbstract:We first demonstrate a wideband generation of picosecond pulse using fiber Optical Parametric Amplifier (FOPA). High quality pulse is generated at 85 nm away from the pump with pulsewidth narrower than that of the pump. We then explore fiber Optical Parametric oscillator (FOPO) configuration which has the advantage of eliminating the need of seeding laser, leading to a potentially wider wavelength tunability and flexibility. The tuning range of the FOPO is from 1511 nm to 1541 nm and from 1583 nm to 1613 nm, which is as wide as 60 nm, with wavelength span of over 100 nm. Nearly-transform-limited sub-picosecond pulses are generated by this technique.
-
a comprehensive study on crosstalk suppression techniques in fiber Optical Parametric Amplifier by modulation format
IEEE Journal of Selected Topics in Quantum Electronics, 2008Co-Authors: B P P Kuo, P. C. Chui, Kenneth K. Y. WongAbstract:With the presence of multiple-WDM input signals, ON-OFF keying (OOK)-modulated signals suffer from crosstalk in fiber Optical Parametric Amplifier (OPA) due to cross-gain modulation (XGM) and four-wave mixing (FWM) effects. We demonstrated substantial crosstalk suppression in one-pump OPA by using return-zero differential phase-shift keying (RZ-DPSK) modulation format, which with its pattern-independent amplitude and subunity duty cycle would be effective in reducing the XGM and FWM effects significantly. By using the RZ-DPSK format, the power penalty was improved by at least 0.8 dB over RZ-OOK, non-RZ (NRZ)-DPSK, and NRZ-OOK formats with four 10 Gb/s channels, separated by 200 GHz spacing. With eight 10 Gb/s channels separated by 100 GHz spacing, a Q-factor penalty of the RZ-DPSK signal was reduced by 2.4 dB compared to RZ-OOK counterparts.
Chuangtian Chen - One of the best experts on this subject based on the ideXlab platform.
-
midinfrared Optical Parametric Amplifier with 6 4 11 mu text m range based on baga 4 se 7
IEEE Photonics Technology Letters, 2015Co-Authors: Feng Yang, Qinjun Peng, Jingyuan Zhang, Chuangtian Chen, Nan Zong, Hongyan Xu, Fengfeng Zhang, Naixia Zhai, Yicheng Wu, Zuyan XuAbstract:A widely tunable picosecond midinfrared (MIR) Optical Parametric Amplifier (OPA) with wavelength ranging from 6.4 to 11 $\mu \text{m}$ based on the BaGa4Se7 crystal was demonstrated. The MIR OPA was pumped by a 30 ps 1064-nm Nd:YAG laser and injected by a KTiOPO4 (KTP)-based narrow-bandwidth widely tunable near-infrared seed. The wide spectral generation using type-I ( $\text{o}\,\,\to \,\, \text{e}\,\,+\,\,\text{e}$ ) critically phase-matched Parametric amplification in BaGa4 Se7 was investigated. The output energies were measured to be $\sim 38~\mu \text{J}$ at 11 $\mu \text{m}$ and up to $\sim 100~\mu \text{J}$ at 6.4 $\mu \text{m}$ under pumping energy of $\sim 4.1$ mJ. Further, the type-I phase-matching angles of BaGa4Se7 crystal for idler light generation in the range of 6.4–11 $\mu \text{m}$ were experimentally measured and the discrepancy between the experiment and theoretical calculation was discussed.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on a new crystal baga 4 se 7
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on baga4se7 crystal
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
Feng Yang - One of the best experts on this subject based on the ideXlab platform.
-
tunable mid ir Optical Parametric Amplifier pumped at 1064 nm based on a wideband gap baga4s7 crystal
Infrared Physics & Technology, 2020Co-Authors: Jingjing Zhang, Feng Yang, Shunda Yang, Shenghao Fang, Xiaojun Wang, Qinjun PengAbstract:Abstract A mid-infrared (IR) Optical Parametric Amplifier (OPA) in a newly developed wide band-gap nonlinear crystal BaGa4S7 (BGS) was reported for the first time. The BGS-OPA was pumped by a 30 ps pulse 1064 nm laser operating at a repetition rate of 10 Hz. A maximum idler pulse energy of ~130 μJ at 7.25 μm was obtained at pump energy of ~6.9 mJ, corresponding to a pump to idler photon conversion efficiency of ~13%. Moreover, across 6.3–8.8 μm idler tuning range was demonstrated, with output energies of ~66 μJ at 6.3 μm and > 27 μJ over the entire tuning range under a fixed pump energy of ~4.1 mJ. Finally, the corresponding type-I (e → o + o) phase-matching (PM) angles of the generated mid-IR idler light in BGS were measured and compared with the theoretical calculation result based on the reported Sellmeier equations.
-
midinfrared Optical Parametric Amplifier with 6 4 11 mu text m range based on baga 4 se 7
IEEE Photonics Technology Letters, 2015Co-Authors: Feng Yang, Qinjun Peng, Jingyuan Zhang, Chuangtian Chen, Nan Zong, Hongyan Xu, Fengfeng Zhang, Naixia Zhai, Yicheng Wu, Zuyan XuAbstract:A widely tunable picosecond midinfrared (MIR) Optical Parametric Amplifier (OPA) with wavelength ranging from 6.4 to 11 $\mu \text{m}$ based on the BaGa4Se7 crystal was demonstrated. The MIR OPA was pumped by a 30 ps 1064-nm Nd:YAG laser and injected by a KTiOPO4 (KTP)-based narrow-bandwidth widely tunable near-infrared seed. The wide spectral generation using type-I ( $\text{o}\,\,\to \,\, \text{e}\,\,+\,\,\text{e}$ ) critically phase-matched Parametric amplification in BaGa4 Se7 was investigated. The output energies were measured to be $\sim 38~\mu \text{J}$ at 11 $\mu \text{m}$ and up to $\sim 100~\mu \text{J}$ at 6.4 $\mu \text{m}$ under pumping energy of $\sim 4.1$ mJ. Further, the type-I phase-matching angles of BaGa4Se7 crystal for idler light generation in the range of 6.4–11 $\mu \text{m}$ were experimentally measured and the discrepancy between the experiment and theoretical calculation was discussed.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on a new crystal baga 4 se 7
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on baga4se7 crystal
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
Qinjun Peng - One of the best experts on this subject based on the ideXlab platform.
-
tunable mid ir Optical Parametric Amplifier pumped at 1064 nm based on a wideband gap baga4s7 crystal
Infrared Physics & Technology, 2020Co-Authors: Jingjing Zhang, Feng Yang, Shunda Yang, Shenghao Fang, Xiaojun Wang, Qinjun PengAbstract:Abstract A mid-infrared (IR) Optical Parametric Amplifier (OPA) in a newly developed wide band-gap nonlinear crystal BaGa4S7 (BGS) was reported for the first time. The BGS-OPA was pumped by a 30 ps pulse 1064 nm laser operating at a repetition rate of 10 Hz. A maximum idler pulse energy of ~130 μJ at 7.25 μm was obtained at pump energy of ~6.9 mJ, corresponding to a pump to idler photon conversion efficiency of ~13%. Moreover, across 6.3–8.8 μm idler tuning range was demonstrated, with output energies of ~66 μJ at 6.3 μm and > 27 μJ over the entire tuning range under a fixed pump energy of ~4.1 mJ. Finally, the corresponding type-I (e → o + o) phase-matching (PM) angles of the generated mid-IR idler light in BGS were measured and compared with the theoretical calculation result based on the reported Sellmeier equations.
-
tunable 7 12 μm picosecond Optical Parametric Amplifier based on a liinse 2 mid infrared crystal
Optics Letters, 2017Co-Authors: Shanpeng Wang, Qinjun Peng, Shibo Dai, Ning Jia, Nan Zong, Yu Shen, Jie Qiao, Zeliang Gao, Xutang TaoAbstract:Mid-infrared (MIR) nonlinear Optical crystals of LiInSe2 (LISe) were grown by a modified Bridgman technique on a (001)-seed. A 7–12 μm widely tunable picosecond (ps) MIR Optical Parametric Amplifier (OPA) based on a LISe crystal was demonstrated for the first time, to the best of our knowledge. The MIR OPA was pumped by a 30 ps 1064 nm Nd:YAG laser and injected by a KTiOPO4 (KTP)-based widely tunable near-infrared seed. The idler operating at 7.5 μm with the highest pulse energy of 170 μJ was obtained under a pump energy of 14 mJ. The corresponding energy conversion efficiency is ∼1.21%, and the photon conversion efficiency is 8.6%. The output energies were measured to be ∼121 μJ at 7 μm and ∼21 μJ at 12 μm.
-
midinfrared Optical Parametric Amplifier with 6 4 11 mu text m range based on baga 4 se 7
IEEE Photonics Technology Letters, 2015Co-Authors: Feng Yang, Qinjun Peng, Jingyuan Zhang, Chuangtian Chen, Nan Zong, Hongyan Xu, Fengfeng Zhang, Naixia Zhai, Yicheng Wu, Zuyan XuAbstract:A widely tunable picosecond midinfrared (MIR) Optical Parametric Amplifier (OPA) with wavelength ranging from 6.4 to 11 $\mu \text{m}$ based on the BaGa4Se7 crystal was demonstrated. The MIR OPA was pumped by a 30 ps 1064-nm Nd:YAG laser and injected by a KTiOPO4 (KTP)-based narrow-bandwidth widely tunable near-infrared seed. The wide spectral generation using type-I ( $\text{o}\,\,\to \,\, \text{e}\,\,+\,\,\text{e}$ ) critically phase-matched Parametric amplification in BaGa4 Se7 was investigated. The output energies were measured to be $\sim 38~\mu \text{J}$ at 11 $\mu \text{m}$ and up to $\sim 100~\mu \text{J}$ at 6.4 $\mu \text{m}$ under pumping energy of $\sim 4.1$ mJ. Further, the type-I phase-matching angles of BaGa4Se7 crystal for idler light generation in the range of 6.4–11 $\mu \text{m}$ were experimentally measured and the discrepancy between the experiment and theoretical calculation was discussed.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on a new crystal baga 4 se 7
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
-
high efficiency and high peak power picosecond mid infrared Optical Parametric Amplifier based on baga4se7 crystal
Optics Letters, 2013Co-Authors: Feng Yang, Jiyong Yao, Kai Feng, Wenlong Yin, Jing Yang, Qinjun Peng, Jingyuan Zhang, Dafu Cui, Chuangtian ChenAbstract:A high efficiency and high peak power picosecond (ps) mid-infrared Optical Parametric Amplifier with a new nonlinear crystal BaGa(4)Se(7) pumped by a 30 ps 1064 nm Nd:YAG laser is demonstrated for the first time. The maximum photon conversion efficiency of 56% from 1064 nm to 3.9 μm idler has been achieved at the pump energy of ~1.8 mJ. A maximum idler output of 830 μJ at 3.9 μm with peak power of ~27 MW was obtained at pump energy of ~9.1 mJ. Moreover, a 3-5 μm idler tuning range was demonstrated, with output energies of ~300 μJ at 5 μm and up to 1 mJ at 3 μm at ~8.2 mJ pump energy.
G Cerullo - One of the best experts on this subject based on the ideXlab platform.
-
generation of high energy sub 20 fs pulses tunable in the 250 310 nm region by frequency doubling of a high power noncollinear Optical Parametric Amplifier
Optics Letters, 2009Co-Authors: Marcus Beutler, Daniele Brida, Cristian Manzoni, Masood Ghotbi, F Noack, G CerulloAbstract:We report on the generation of powerful sub-20 fs deep UV pulses with 10 μJ level energy and broadly tunable in the 250-310 nm range. These pulses are produced by frequency doubling a high-power noncollinear Optical Parametric Amplifier and compressed by a pair of MgF2 prisms to an almost transform-limited duration. Our results provide a power scaling by an order of magnitude with respect to previous works.
-
two Optical cycle pulses in the mid infrared from an Optical Parametric Amplifier
Optics Letters, 2008Co-Authors: Daniele Brida, Marco Marangoni, Cristian Manzoni, S De Silvestri, G CerulloAbstract:Ultrabroadband mid IR pulses with energy as high as 2 μJ and tunability from 2 to 5 μm are generated as the idler beam of an 800 nm pumped Optical Parametric Amplifier in periodically poled stoichiometric lithium tantalate. After bulk compression in a Ge plate and frequency-resolved-opticle-gating characterization, a pulse duration as low as 25 fs was measured, corresponding to two Optical cycles of the 3.6 μm carrier wavelength.
-
sub two cycle light pulses at 1 6 μm from an Optical Parametric Amplifier
Optics Letters, 2008Co-Authors: Giovanni Cirmi, S De Silvestri, Stefano Bonora, Paolo Villoresi, G CerulloAbstract:We generate ultrabroadband pulses, spanning the 1200-2100 nm wavelength range, from an 800 nm pumped Optical Parametric Amplifier (OPA) working at degeneracy. We compress the microjoule-level energy pulses to nearly transform-limited 8.5 fs duration by an adaptive system employing a deformable mirror. To our knowledge, these are the shortest light pulses generated at 1.6 μm.
-
generation of broadband mid infrared pulses from an Optical Parametric Amplifier
Optics Express, 2007Co-Authors: Giovanni Cirmi, S De Silvestri, G CerulloAbstract:We report on the direct generation of broadband mid-IR pulses from an Optical Parametric Amplifier. Several crystals with extended IR transparency, when pumped at 800 nm, display a broad phase-matching bandwidth around 1 μm, allowing for the generation of idler pulses spanning the 3–5 μm wavelength range. Using LiIO3, we produce 2-μJ pulses tunable in the 3–4 μm range with bandwidth supporting 30-fs transform-limited duration.
-
few Optical cycle pulses in the near infrared from a noncollinear Optical Parametric Amplifier
Optics Letters, 2007Co-Authors: Giovanni Cirmi, Daniele Brida, Marco Marangoni, Cristian Manzoni, S De Silvestri, G CerulloAbstract:We extend the concept of broadband phase matching in a noncollinear Optical Parametric Amplifier (NOPA) to the near-IR. In an 800 nm pumped NOPA using periodically poled stoichiometric lithium tantalate, we amplify a spectrum spanning the 1.1-1.7 μm range and corresponding to two Optical cycles of the carrier wavelength. A limited portion of the spectrum is compressed by a prism pair down to 16 fs.