Prof. Pu Zhang Profile

Prof. Pu Zhang

at XIOPM CAS

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 4 April 2023 Paper

Stand-off detection of explosive hazards based on time-gated Raman spectroscopy

Pu Zhang, Xiangping Zhu, Wenzhen Ren, Bo Wang, Junhong Yang

Proceedings Volume 12617, 126174J (2023) https://doi.org/10.1117/12.2666356

KEYWORDS: Raman spectroscopy, Explosives, Explosives detection, Signal detection, Fluorescence, Light scattering

Read Abstract +

There are currently lots of research activities concerning explosive hazards detection, and stand-off detection of explosives is in main focus. The reason for this interest is the occurrence of terrorist attacks on the civilian society involving Improvised Explosives Devices (IED). Laser-based spectroscopies are the only currently viable techniques that can be utilized to detect trace amounts of explosives at stand-off distances. In particular, Raman Spectroscopy (RS) has been shown to be effective for stand-off detection and has the ability to both detect and identify explosive materials. Raman spectroscopy is virtually instantaneous, non-destructive in nature and provides high selectivity. The traditional Raman spectrometer utilizes continuous lasers and CCDs to detection the scattering signal, which greatly limits the application of Raman spectroscopy in the stand-off detection of explosive hazards due to the weak signal, strong background fluorescence, ambient light interference, and long analysis time. Time-gated Raman spectroscopies are based on ultrafast pulsed lasers and time-resolved single-photon detection techniques. Through the time-gated method, the Raman signal intensity can be greatly improved, and the influence of fluorescence and environmental light can be effectively suppressed. In this work, the time-gated Raman system utilizing frequency-doubled Nd:YAG lasers at 532 nm excitation was developed. The Cassegrain telescope was coupled to the Raman spectrometer using a fiber optics cable, and notch filter was used to reject Rayleigh scattering light. The Raman scattered light was collected by a telescope and then transferred via fiber optic to spectrometer and finally directed into Intensified CMOS (ICMOS) detector. The applications of time-gated Raman spectroscopy in stand-off detection of hazardous explosives have been performed. The Raman spectra of DNT, TNT, RDX and NaNO₃ at a stand-off distance of 50 m have been identified with a detection limit of 1 mg/cm².

Proceedings Article | 27 December 2022 Poster + Paper

A compact killowatt-level QCW high-power semiconductor laser array based on dual-chip integration

Pu Zhang, Wenzhen Ren, Bo Wang, Xiangping Zhu, Junhong Yang

Proceedings Volume 12311, 123110W (2022) https://doi.org/10.1117/12.2643908

KEYWORDS: Semiconductor lasers, High power lasers, Packaging

Read Abstract +

Proceedings Article | 24 November 2021 Paper

Standoff detection of explosive materials using time-gated UV-Raman spectroscopy

Bo Wang, Pu Zhang, Shuyao Zhang, Xiangping Zhu, Wei Zhao

Proceedings Volume 12064, 120640Q (2021) https://doi.org/10.1117/12.2606981

KEYWORDS: Raman spectroscopy, Potassium, Standoff detection, Explosives, Explosives detection, Spectroscopy, Raman scattering, Light scattering, Laser energy

Read Abstract +

Proceedings Article | 21 February 2020 Paper

Temperature distribution induced spectral broadening of high-power diode lasers

Di-Hai Wu, Pu Zhang, Bin Liu, Chung-En Zah, Xingsheng Liu

Proceedings Volume 11261, 1126113 (2020) https://doi.org/10.1117/12.2547159

KEYWORDS: Semiconductor lasers, High power lasers, 3D modeling, Thermal modeling, Mathematical modeling, Resistance, Packaging, Thermal effects

Read Abstract +

Proceedings Article | 19 November 2019 Paper

Performance of high-power diode lasers operated at cryogenic temperature

Pu Zhang, Mingpei Wang, Zhiqiang Nie, Wuhao Yang

Proceedings Volume 11182, 111820L (2019) https://doi.org/10.1117/12.2536712

KEYWORDS: Semiconductor lasers, Cryogenics, High power diode lasers, Quantum efficiency, Electro optics, High power lasers

Read Abstract +

Proceedings Article | 22 February 2017 Presentation + Paper

Optimization of microchannel cooler of high power diode laser array package

Dihai Wu, Pu Zhang, Zhiqiang Nie, Xuejie Liang, Jingwei Wang, Xingsheng Liu

Proceedings Volume 10085, 100850I (2017) https://doi.org/10.1117/12.2255693

KEYWORDS: Copper, Microfluidics, Solids, Fluid dynamics

Read Abstract +

Proceedings Article | 22 February 2017 Presentation + Paper

Thermal characteristics of compact conduction-cooled high power diode laser array packages

Pu Zhang, Xingsheng Liu, Qiwen Zhu, Jingwei Wang

Proceedings Volume 10085, 100850A (2017) https://doi.org/10.1117/12.2250258

KEYWORDS: High power diode lasers, Packaging, Thermal effects, Thermal analysis, Semiconductor lasers, Ceramics, Finite element methods, Pulsed laser operation, Indium

Read Abstract +

Proceedings Article | 20 February 2015 Paper

Effects of packaging on the performances of high brightness 9xx nm CW mini-bar diode lasers

Xiaoning Li, Jingwei Wang, Feifei Feng, Yalong Liu, Dongshan Yu, Pu Zhang, Xingsheng Liu

Proceedings Volume 9346, 93460C (2015) https://doi.org/10.1117/12.2080480

KEYWORDS: Semiconductor lasers, Indium, Packaging, Continuous wave operation, Polarization, Reliability, High power diode lasers, Heatsinks, Fiber lasers, Copper

Read Abstract +

Proceedings Article | 20 February 2015 Paper

Effect of interface layer on the performance of high power diode laser arrays

Pu Zhang, Jingwei Wang, Lingling Xiong, Xiaoning Li, Dong Hou, Xingsheng Liu

Proceedings Volume 9346, 934607 (2015) https://doi.org/10.1117/12.2077029

KEYWORDS: High power diode lasers, Semiconductor lasers, Interfaces, Finite element methods, Packaging, Laser development, Numerical simulations, Thermal effects, Copper, Reliability

Read Abstract +

Proceedings Article | 3 February 2015 Paper

A 3000W 808nm QCW G-stack semiconductor laser array

Pu Zhang, Jingwei Wang, Dong Hou, Zhenfu Wang, Lingling Xiong, Hui Liu, Zhiqiang Nie, Xingsheng Liu

Proceedings Volume 9255, 92550W (2015) https://doi.org/10.1117/12.2065663

KEYWORDS: Semiconductor lasers, Heatsinks, High power lasers, Finite element methods, Reliability, Copper, Laser development, Optical simulations, Indium, Laser welding

Read Abstract +

SPIE Journal Paper | 21 October 2013

Double-cutting beam shaping technique for high-power diode laser area light source

Zhihua Huang, Lingling Xiong, Hui Liu, Zhenfu Wang, Pu Zhang, Zhiqiang Nie, Dihai Wu, Xingsheng Liu

OE, Vol. 52, Issue 10, 106108, (October 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.10.106108

KEYWORDS: Prisms, Beam shaping, Semiconductor lasers, Light sources, High power lasers, Reflectors, Optical components, Optical simulations, Polarization, Fiber couplers

Read Abstract +

Proceedings Article | 9 February 2012 Paper

High-power semiconductor laser array packaged on microchannel cooler using gold-tin soldering technology

Jingwei Wang, Lijun Kang, Pu Zhang, Zhiqiang Nie, Xiaoning Li, Lingling Xiong, Xingsheng Liu

Proceedings Volume 8241, 82410H (2012) https://doi.org/10.1117/12.909655

KEYWORDS: Semiconductor lasers, High power lasers, Laser welding, Packaging, Indium, Laser applications, Resistance, High power diode lasers, Continuous wave operation, Reliability

Read Abstract +

Showing 5 of 12 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years