Prof. Guanghua Cheng Profile

Prof. Guanghua Cheng

at Northwestern Polytechnical Univ

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Publications (21)

Proceedings Article | 26 August 2024 Poster + Paper

FIRST 5T 3D: interferometric performances of a laser written bream combiner for FIRST/SUBARU

G. Martin, K. Barjot, M. Lallement, H. Kenchington-Smith, E. Huby, S. Lacour, C. d'Amico, R. Stoian, S. Vievard, O. Guyon, V. Deo, G. Zhang, G. Cheng

Proceedings Volume 13100, 131007C (2024) https://doi.org/10.1117/12.3019221

KEYWORDS: Waveguides, Microelectromechanical systems, Beam combiners, Binary stars, Photonic integrated circuits, Laser interferometry, Crosstalk, Telescopes, Laser optics, Equipment

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FIRST (Fibered Imager foR a Single Telescope instrument) is an on-sky instrument at SUBARU Telescope that enables high-contrast imaging and spectroscopy, thanks to a unique combination of pairwise combination of sub-apertures using a Photonic Integrated Circuit that allows spatial filtering by single-mode waveguides and cross-dispersion in the visible (~ 600-800 nm), a high-efficiency alternative to sparse aperture masking. To reduce crosstalk observed in planar PICs, and therefore increase the instrument’s stability and sensitivity, we have designed and fabricated a series of 3D laserwritten optical PICs with 5T beam combiners. Different laser powers were used to address different single-mode spectral ranges. The multi-aperture beam combiner consists of five input waveguides spaced by 250 μm. Each input is split into four waveguides and the twenty channels undergo pairwise recombination, using Y-junctions, to produce ten outputs. In this work, we present the interferometric performances of these 3D PICs when exposed to a point-like light source (single star) or a two-points-like light source (binary) on the FIRST/SUBARU instrument replica built at LESIA – Observatoire de Paris.

In previous work, we identified the optimal 5T 3D device, as being single-mode between 550-800 nm and showing good internal transmission in all input channels, above 45% at 635nm. The internal transmission (sum of the output values obtained for the four waveguides of the 1x4 splitter as normalized to the output signal obtained from the straight waveguide used as a reference) was measured. Two inputs achieved 80% transmission. The PIC was installed in the FIRST/SUBARU optical bench simulator at LESIA, to inject light into five inputs simultaneously and scan the fringes using independent MEMS segments, inducing a relative OPD modulation. The results of this study, comparing the signature obtained for a single source (star) as compared to a binary, will be presented in this work. We will show that both polarizations are guided, with no crosstalk, and analyze the interferometric performances as a function of the source type, showing that the binary companion can be detected.

Proceedings Article | 29 August 2022 Poster + Paper

FIRST 5T 3D: a laser written device for FIRST/SUBARU reducing crosstalk and propagation losses

G. Martin, A. Morand, C. d'Amico, R. Stoian, K. Barjot, M. Lallement, N. Cvetojevic, S. Vievard, E. Huby, S. Lacour, V. Deo, O. Guyon, J. Lv, G. Zhang, G. Cheng

Proceedings Volume 12188, 121882T (2022) https://doi.org/10.1117/12.2630010

KEYWORDS: Waveguides, Telescopes, Microelectromechanical systems, Laser optics, Interferometry, Modulation, Wave propagation, Visible radiation, Polarization, Optical simulations

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FIRST (Fibered Imager foR a Single Telescope instrument) is an instrument that enables high contrast imaging and spectroscopy, thanks to a unique combination of sparse aperture masking, spatial filtering by single-mode waveguides and cross-dispersion in the visible. In order to increase the instrument’s stability and sensitivity, we have designed and fabricated a 3D laser-written optical chip 5T beam combiner. The multi-aperture beam combiner consists of 5 input waveguides spaced by 250um. Each input is split into 4 waveguides. A pairwise recombination scheme with Yjunctions produces/leads to 10 outputs (127um separation, compatible with commercial V-grooves). In this work, we present the experimental characterization of the chip: transmission performance, polarization issues and single mode spectral range. The targeted single mode spectral range must cover 550-800nm. Different optical powers for laser writing are used to finely tune the ideal single-mode behavior of the waveguides, ranging from 220 to 270mW. A straight waveguide was used as a reference, imprinted close to the first interferometric channel. Using different lasers (635nm, 780nm and 980nm) as well as wideband sources, we have been able to characterize the spectral transmission, the polarization behavior (TE/TM) and the interferometric contrast. The chip was inserted in the FIRST/SUBARU optical bench simulator at LESIA, in order to inject the 5 inputs simultaneously and scan the fringes using 4 independent MEMS, inducing a relative OPD modulation. Preliminary results show very good transmission for such a complex chip: all input channels are above 45% at 635nm (comparing the injected single mode with the sum of the 4 corresponding outputs), with two inputs reaching 80%. A huge advantage of this technology is to avoid the crosstalk due to in-plane waveguide crossings, and we show that no crosstalk is indeed observed. Both polarizations are transmitted, without noticeable birefringence. However, perfect vertical alignment of the outputs is difficult to obtain, and must be optimized prior to any connectorization to fiber bundles.

SPIE Journal Paper | 24 August 2021

Investigation of the size of nanoparticles formed during femto- and nanosecond laser ablation of zircon

Yong Yang, Rui Lou, Honglin Yuan, Yiqing Shu, Wenhui Fan, Guanghua Cheng, Jinhai Si

OE, Vol. 60, Issue 08, 086108, (August 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.8.086108

KEYWORDS: Nanoparticles, Laser ablation, Femtosecond phenomena, Pulsed laser operation, Particles, Scanning electron microscopy, Optical engineering, Minerals, Liquids, Chemical elements

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Proceedings Article | 24 June 2021 Paper

Research on MEMS biaxial electromagnetic micromirror based on radial magnetic field distribution

Chen Li, Shihao Xu, Libo Zhao, Guanghua Cheng

Proceedings Volume 11885, 1188510 (2021) https://doi.org/10.1117/12.2602278

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Laser written 3D 3T spectro-interferometer: study and optimisation of the laser-written nano-antenna

Myriam Bonduelle, Guillermo Martin, Irene Heras Perez, Alain Morand, Ciro d'Amico, Razvan Stoian, Guodong Zhang, Guanghua Cheng

Proceedings Volume 11446, 114462T (2020) https://doi.org/10.1117/12.2562179

KEYWORDS: Infrared spectroscopy, Integrated optics, Infrared radiation, Spectroscopy, Waveguides, Infrared detectors, Beam splitters, Fabrication, Mirrors, Dielectrics

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SPIE Journal Paper | 25 June 2020

Dissipative soliton operation of a diode-pumped Yb:KGW solid-state laser in the all-positive-dispersion regime

Guangying Li, Rui Lou, Xu Wang, Zhe Sun, Yishan Wang, Xiaoping Xie, Guodong Zhang, Guanghua Cheng

OE, Vol. 59, Issue 06, 066105, (June 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.6.066105

KEYWORDS: Mode locking, Solitons, Solid state lasers, Diode pumped solid state lasers, Mirrors, Crystals, Oscillators, Pulsed laser operation, Fiber lasers, Picosecond phenomena

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SPIE Journal Paper | 30 October 2019 Open Access

Influence of energy fluence and overlapping rate of femtosecond laser on surface roughness of Ti-6Al-4V

Wen-Hui Fan, Yong Yang, Rui Lou, Xu Chen, Jing Bai, Weiwei Cao, Guanghua Cheng, Jin-Hai Si

OE, Vol. 58, Issue 10, 106107, (October 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.10.106107

KEYWORDS: Femtosecond phenomena, Polishing, Surface roughness, Surface finishing, Nanoparticles, Pulsed laser operation, Scanning electron microscopy, Laser processing, Silicon, Laser ablation

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Proceedings Article | 24 January 2019 Paper

Nanosecond level passively Q-switched Ti:Sapphire laser using MoS2 as a saturable absorber

Zhe Sun, Guangying Li, Huan Liu, Guanghua Cheng

Proceedings Volume 11052, 1105213 (2019) https://doi.org/10.1117/12.2521960

KEYWORDS: Molybdenum, Q switched lasers, Sapphire lasers, Q switching, Pulsed laser operation, Nanomaterials, Modulation, Infrared radiation, Q switches, Nd:YAG lasers

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Proceedings Article | 12 May 2017 Paper

Transmitting volume Bragg gratings in PTR glass written with femtosecond Bessel beams

G. Cheng, Y. Zhang, Q. Liu

Proceedings Volume 10173, 1017322 (2017) https://doi.org/10.1117/12.2268292

KEYWORDS: Fiber Bragg gratings, Glasses, Femtosecond phenomena, Bessel beams, Diffraction, Crystals, Phase contrast, Refractive index, Diffraction gratings, Ultraviolet radiation

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Proceedings Article | 12 March 2015 Paper

Dynamics of optically excited tungsten and silicon for ripples formation

Hao Zhang, Chen Li, Jean-Philippe Colombier, Guanghua Cheng, Razvan Stoian

Proceedings Volume 9351, 93510H (2015) https://doi.org/10.1117/12.2076593

KEYWORDS: Finite-difference time-domain method, Silicon, Tungsten, Dielectrics, Femtosecond phenomena, Plasmonics, Dielectric polarization, Absorption, Refractive index, Optical simulations

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Proceedings Article | 19 February 2015 Paper

Large mode area waveguides by volume ultrafast laser photoinscription

Guanghua Cheng, Xin Liu, Razvan Stoian

Proceedings Volume 9449, 944903 (2015) https://doi.org/10.1117/12.2083183

KEYWORDS: Waveguides, Ultrafast lasers, Silica, Glasses, Finite element methods, Mid-IR, Chalcogenide glass, Camera shutters, Near field, Microscopes

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Proceedings Article | 2 May 2014 Paper

Raman spectroscopy and periodic surface structures of Mg:ZnO thin film fabricated by femtosecond laser pulses

Hongying Wang, Zhen Cheng, Guanghua Cheng, Fei Ma, Yuanyuan Li

Proceedings Volume 9126, 91261X (2014) https://doi.org/10.1117/12.2051212

KEYWORDS: Raman spectroscopy, Pulsed laser operation, Thin films, Femtosecond phenomena, Laser ablation, Scanning electron microscopy, Polarization, Magnesium, Sputter deposition, Zinc oxide

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Proceedings Article | 16 May 2013 Paper

Experimental study of the damage of silicon photoelectric detector materials induced by repetitively pulsed femtosecond laser

Yue Cai, Zhi-liang Ma, Zhen Zhang, Guang-hua Cheng, Xi-sheng Ye, De-yan Cheng

Proceedings Volume 8796, 87960I (2013) https://doi.org/10.1117/12.2011136

KEYWORDS: Sensors, Silicon, Semiconductor lasers, Femtosecond phenomena, Laser damage threshold, Pulsed laser operation, Laser energy, Thermal effects, Laser induced damage, Laser ablation

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Proceedings Article | 21 February 2011 Paper

3D adaptive spatio-temporal control of laser-induced refractive index changes in optical glasses

R. Stoian, G. Cheng, C. Mauclair, A. Mermillod-Blondin, K. Mishchik, E. Audouard, A. Rosenfeld, I. Hertel

Proceedings Volume 7921, 79210H (2011) https://doi.org/10.1117/12.873071

KEYWORDS: Refractive index, Dielectric polarization, Glasses, Adaptive optics, Transient nonlinear optics, Ultrafast lasers, Geometrical optics, Birefringence, Laser processing, Dielectrics

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Proceedings Article | 4 January 2008 Paper

Time-domain terahertz spectroscopy and applications on drugs and explosives

W. H. Fan, W. Zhao, G. H. Cheng, A. Burnett, P. Upadhya, J. Cunningham, E. Linfield, A. Davies

Proceedings Volume 6840, 68400T (2008) https://doi.org/10.1117/12.785002

KEYWORDS: Terahertz spectroscopy, Signal to noise ratio, Crystals, Thermal effects, Temperature metrology, Spectroscopy, Packaging, Explosives, Absorption, Terahertz radiation

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Proceedings Article | 29 January 2007 Paper

Theoretical and numerical investigations of fused silica modification using ultrafast double-pulses

Qing Liu, Jianjun Wang, Guanghua Cheng, Junjun Chen, Feifei Liu, Changqing Liu

Proceedings Volume 6279, 627947 (2007) https://doi.org/10.1117/12.725370

KEYWORDS: Electrons, Ionization, Silica, Dielectrics, Pulsed laser operation, Ultrafast phenomena, Solids, Picosecond phenomena, Femtosecond phenomena, Laser irradiation

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Proceedings Article | 10 June 2006 Paper

Bit-wise volumetric storage in transparent materials by ultrafast laser

Guanghua Cheng, Yishan Wang, Guofu Chen, Wei Zhao, Haining Men, Chuandong Sun

Proceedings Volume 6344, 634417 (2006) https://doi.org/10.1117/12.693589

KEYWORDS: Femtosecond phenomena, Modulation, Optical storage, 3D optical data storage, Confocal microscopy, Ultrafast lasers, Laser development, Polymethylmethacrylate, Optical amplifiers, Silica

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Proceedings Article | 9 June 2006 Paper

Precise processing of transparent material with femtosecond laser pulses

Lin Ma, Shunxiang Shi, Guanghua Cheng, Wei Zhao, Guofu Chen

Proceedings Volume 6149, 614935 (2006) https://doi.org/10.1117/12.674323

KEYWORDS: Femtosecond phenomena, Waveguides, Modulation, Glasses, Silica, Micromachining, Optical components, 3D optical data storage, Pulsed laser operation, Diffraction gratings

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Proceedings Article | 3 December 2005 Paper

Optical active waveguide in Er³⁺-Yb³⁺ codoped lithium silicate glass written with near-IR femtosecond laser pulses

Lin Ma, Shunxiang Shi, Guanghua Cheng, Guofu Chen

Proceedings Volume 6019, 60193C (2005) https://doi.org/10.1117/12.636433

KEYWORDS: Waveguides, Erbium, Lithium, Silicate glass, Femtosecond phenomena, Optical amplifiers, Active optics, Fiber amplifiers, Refractive index, Microscopes

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Proceedings Article | 28 January 2005 Paper

Multiple micro-explosions driven by a single focused femtosecond pulse in transparent material

Lin Ma, Shunxiang Shi, Guanghua Cheng, Guofu Chen

Proceedings Volume 5646, (2005) https://doi.org/10.1117/12.576959

KEYWORDS: Femtosecond phenomena, Refractive index, Glasses, Silica, Plasma, Pulsed laser operation, Optical fibers, Objectives, Numerical simulations, Wave propagation

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Proceedings Article | 3 January 2005 Paper

Three-dimensional optical storage recording by microexplosion in a doped PMMA polymer

Huohong Tang, Hongfang Jiu, Bing Jiang, Jianwen Cai, Hui Xing, Qijin Zhang, Wenhao Huang, Andong Xia, Qin Liu, Guanghua Cheng, Guofu Chen

Proceedings Volume 5643, (2005) https://doi.org/10.1117/12.576587

KEYWORDS: Polymethylmethacrylate, 3D optical data storage, Cerium, Luminescence, Optical storage, Samarium, Absorption, Pulsed laser operation, Femtosecond phenomena, Microscopes

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Showing 5 of 21 publications

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