- Elucidate the dynamics of solid-state ultraviolet lasers using Ce:LiCAF crystals.
- Develop tunable and narrow solid-state UV laser system incuding a laser amplifier nased on Ce:LiCAF crystals.
- Initially utilize UV laser pulses for environmental research at the Institute of Physics.
- Train high-quality scientific human resource as well as promote international cooperation.

- The emission and laser amplification processes for broadband, tunable, and narrow linewidth lasers using Ce:LiCAF crystals pumped by the 266-nm fourth harmonics of an Nd:YAG laser have been clearly studied by theoretical simulation. A tunable, dual-wavelength, and narrow linewidth laser using a single solid state gain medium in a double Littman resonator was also investigated. The characteristics of UV laser scattering on common aerosol particles in polluted atmosphere are likewise examined.
- We have successfully developed laser oscillators and laser amplifiers for broadband, tunable, and narrow-linewidth UV lasers using Ce:LiCAF crystals as gain medium pumped by the 266-nm fourth harmonics of an Nd:YAG laser.
- On LiCAF crystals, the effect of Ce doping concentration and distribution on the lasing performance such as lasing threshold and conversion efficiency have been demonstrated. The results show that improved laser performance could lead to new breakthroughs in laser output energies especially in the UV region for many potential applications.

The first solid-state UV laser using an active fluoride medium, LiCAF doped with rare earth ion, cerium (Ce3+) has been developed successfully in Vietnam.

- 01 Ce:LiCAF ultraviolet laser system pumped by Nd:YAG Q-switch laser at 266 nm and 10 Hz. Laser tunable from 280 ÷ 300 nm, narrow spectral linewidth Δλ ≤ 0.5 nm (FWHM), pulse energy up to 5.40 mJ; pulse width < 1 ns; energy stability ± 5%; laser divergence ≤ 5 mrad; size of Ce:LiCAF laser 0.6 x 1.2 m (excluding laser pump).
Scientific papers in referred journals (list): 02 ISI articles, and 03 articles in the specialized Proceedings.
1.    Diep Nguyen Van, Marilou Cadatal-Raduban, Duong Van Pham, Tu Xuan Nguyen, Thu Vu Van, Minh Hong Pham, Tunable dual wavelength and narrow linewidth laser using a single solid-state gain medium in a double Littman resonator, Optics Communications, ISSN: 0030-4018, 496, 2021, pp. 127131 (IF=2.51).
2.    Marilou Cadatal-Raduban, Kohei Yamanoi, Minh Hong Pham, Takaya Taniguchi, Xi Yu, Nobuhiko Sarukura, Shingo Ono, Effect of doping distribution on the lasing performance of a cerium-doped, Journal of Crystal Growth, ISSN: 0022-0248, 2021, 574, pp. 126326 (IF=1,86).
3.    Phạm Văn Dương, Nguyễn Văn Điệp, Nguyễn Xuân Tú, Nguyễn Xuân Quyết, Nguyễn Thành Công, Lê Cảnh Trung, Phạm Hồng Minh, Nghiên cứu động học phát xạ băng hẹp, điều chỉnh bước sóng của laser tử ngoại Ce:LiCAF sử dụng cách tử, Kỷ yếu Hội nghị Vật lý Thừa Thiên Huế 2021, ISBN: 978-604-974-905-6, trang 12-17.
4.    Phạm Văn Dương, Nguyễn Văn Điệp, Nguyễn Xuân Tú, Phùng Việt Tiệp, Phạm Hồng Minh, Nghiên cứu và phát triển các hệ laser tử ngoại rắn sử dụng tinh thể Ce:LiCAF, Tuyển tập báo cáo Hội nghị Khoa học 45 năm Viện Hàn lâm Khoa học và Công nghệ Việt Nam, 2020, ISBN:978-604-9985-06-5, trang 81-88.
5.    Nguyễn Văn Điệp, Phạm Văn Dương, Nguyễn Ngọc Anh, Vũ Văn Thú, Phạm Hồng Minh, Phát đồng thời hai bức xạ laser tử ngoại đơn sắc điều chỉnh liên tục trên một dải phổ rộng với tinh thể Ce:LiCAF, Tuyển tập báo cáo Hội nghị Khoa học 45 năm Viện Hàn lâm Khoa học và Công nghệ Việt Nam, 2020, ISBN:978-604-9985-06-5, trang 89-96.
Training high-quality human resources for the field of modern photonic physics in Vietnam. The project also supported two Ph.D. students (Pham Van Duong and Nguyen Van Diep), 01 Master student.

Key lab of laser and spectroscopy, Institute of Physics, Vietnam Academy of Science and Technology.