Prof. Chun-Nien Liu Profile

Prof. Chun-Nien Liu

at National Chung Hsing Univ

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Author

Publications (9)

Proceedings Article | 9 March 2024 Presentation

Novel optical phased array for all solid-state LiDAR module in autonomous vehicles

Yung-Peng Chang, Kuo-Yin Huang, Ke-Peng Chang, Chun-Nien Liu, Charles Tu, Wood-Hi Cheng, Chih-Feng Wang

Proceedings Volume PC12890, PC128900R (2024) https://doi.org/10.1117/12.3000258

KEYWORDS: LIDAR, Unmanned vehicles, Solid state electronics, Phased array optics, Design and modelling, 3D modeling, Silicon, Reflection, Pulsed laser operation, Optical resolution

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Proceedings Article | 3 October 2022 Poster

Wide field of view and high central brightness of single crystal phosphor converter layer for smart headlights

Yung-Peng Chang, Hsing-Kun Shih, Chun-Nien Liu, Wood-Hi Cheng

Proceedings Volume 12239, 122390P (2022) https://doi.org/10.1117/12.2632918

KEYWORDS: Headlamps, Crystals, Light sources, Visibility, Light emitting diodes, Laser crystals, Unmanned vehicles, Light sources and illumination, Electrochemical etching, Blue light emitting diodes

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Proceedings Article | 4 March 2022 Presentation + Paper

Analysis of high-power operation of laser excited stationary phosphor

Kenneth Li, Y.P. Chang, Lion Wang, Andy Chen, W.H. Cheng, Pin Han, Chih-Ming Chen, C.N. Liu

Proceedings Volume 12022, 120220L (2022) https://doi.org/10.1117/12.2609135

KEYWORDS: Mirrors, Projection systems, High power lasers, Reflectivity, Prototyping, Light sources, Diffusers, Reflectors, Ray tracing, Ceramics

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Proceedings Article | 4 March 2022 Poster + Paper

Record gain of 300-nm broadband single-model Cr-doped crystalline fiber employing novel growth of smaller core

Kai-Chieh Chang, Wei-Chih Cheng, Chun-Nien Liu, Charles Tu, Tien-Tsorng Shih, Sheng-Lung Huang, Wood-Hi Cheng

Proceedings Volume 12028, 120280J (2022) https://doi.org/10.1117/12.2608937

KEYWORDS: Fiber amplifiers, Crystals, Laser stabilization, Refractive index, Erbium, Cladding, Chromium, Carbon dioxide lasers, Process control, Picosecond phenomena

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Proceedings Article | 1 August 2021 Poster

Advanced driving beam employing reliable phosphor-converter layer for automotive headlight

Hsing-Kun Shih, Yung-Peng Chang, Chun-Nien Liu, Wood-Hi Cheng

Proceedings Volume 11828, 118280G (2021) https://doi.org/10.1117/12.2593085

KEYWORDS: Headlamps, Cerium, Semiconductor lasers, Unmanned vehicles, Silicon, Projection devices, Mirrors, Laser crystals, Electrochemical etching, Digital micromirror devices

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Proceedings Article | 5 March 2021 Presentation

Reflex optical phased array for autonomous vehicles using new scheme of LiDAR design

Chia-Ming Liu, Chun-Nine Liu, Hsing-Kun Shih, Tien-Tsorng Shih, Charles Tu, Wood-Hi Cheng

Proceedings Volume 11697, 116970J (2021) https://doi.org/10.1117/12.2577659

KEYWORDS: LIDAR, Unmanned vehicles, Phased array optics, Ultrasonics, Sensors, Radar, Free space optics, Wavefronts, Thin films, Solid state physics

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Proceedings Article | 12 September 2019 Presentation

Integration of LiDAR with laser headlight for autonomous driving (Conference Presentation)

Yung-Peng Chang, Hsin-An Chen, Shih-Hsin Chang, Zingway Pei, Chun-Nien Liu, Pin Han, Wood-Hi Cheng

Proceedings Volume 11125, 111250H (2019) https://doi.org/10.1117/12.2526390

KEYWORDS: LIDAR, Headlamps, Control systems, Radar, Ultrasonics, Environmental sensing, Laser development, Integrated optics, Optical imaging, Spectral resolution

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Lidar, radar, optical imaging and ultrasonic are important environmental sensing technologies in the field of autonomous driving. Among them, the radar can perform long-distance sensing, however it is limited by the resolution and cannot distinguish objects. Optical images have clear object resolving power, but hardly to get distance information. Ultrasonic only detect objects that are in very short distances. Therefore, it is necessary to have a technique that can clearly distinguish the objects and get the object information such as speed and distance at medium-range (100-m) for autonomous driving scheme entering level 4 and level 5. The existing light technology in the autonomous driving is to place the Lidar module on the roof of a car and perform environment sensing in a rotating manner. Such technology has low sensing capability and is not conform to the development direction of the vehicle industry that not fulfill the demand of autonomous car. In contrast to Lidar module on the roof, placing the Lidar on the front of the car has many advantages, such as easy to collect dust, suffer water corrosion and difficult to set up the electrical system. Integrating the Lidar with headlight system is a feasible direction to solve the aforementioned problems. In this study, we will develop laser headlights system with Lidar module by integrating the optical system of Lidar into headlight a unit, in which the smart laser headlight was achieved by feedback control orders system. The laser headlight will focus on the development of smart headlights with laser as the light source. With the feedback of the system, it can control the car's light field, avoid high-reflection areas at night. The integrated Lidar module will develop a quasi-static optical scanning system with a wavelength of 1550 nm and embed it in the optical path of the laser headlight. By wavelength differences, the optical path of Lidar does not interfere with headlight and high quality optical data could be obtained. Despite adapting 905 nm as optical wavelength in the current technology, the 1550 nm wavelength selected by this study meets the safety regulations and will not cause damage to the human eye at night or during the day. In this study, we will develop a Lidar module attached to a 10W laser headlight for autonomous driving. The simulation and optical performance of integration of Lidar module with laser headlight will be presented.

Proceedings Article | 17 September 2018 Presentation

A novel laser headlight module (Conference Presentation)

Yung-Peng Chang, Jin-Kai Chang, Shih-Hsin Chang, Hsin-An Chen, Chun-Nien Liu, Han Pin, Wood-Hi Cheng

Proceedings Volume 10745, 107450Q (2018) https://doi.org/10.1117/12.2318918

KEYWORDS: Headlamps, Glasses, High power lasers, Silicon, Semiconductor lasers, Reliability, Aluminum

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Proceedings Article | 30 November 2016 Presentation

Next-generation high-reliability laser light engine by glass phosphor-converted layer (Conference Presentation)

Yung-Peng Chang, Jin-Kai Chang, Wei-Chih Cheng, Chun-Nien Liu, Li-Yin Chen, Wood-Hi Cheng

Proceedings Volume 9954, 995407 (2016) https://doi.org/10.1117/12.2235625

KEYWORDS: Silicon, Semiconductor lasers, Glasses, Reliability, High power lasers, Projection systems, Laser systems engineering, Sun, Infrared radiation, Super resolution microscopy

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Showing 5 of 9 publications

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