Related Experiment Video
Updated: Jun 17, 2026
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
Picosecond optical vortex converted from multigigahertz self-mode-locked high-order Hermite-Gaussian Nd:GdVO(4)
H C Liang1, Y J Huang, Y C Lin
1Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan.
Optics Letters
|December 18, 2009
Summary
Researchers developed a gigahertz laser using neodymium-doped gadolinium vanadate (Nd:GdVO4) crystals. This laser generates high-order Hermite-Gaussian (HG) beams, which are then converted into picosecond optical vortex pulses.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- High-order Hermite-Gaussian (HG) beams are crucial for advanced optical applications.
- Nd:GdVO4 lasers offer potential for high-power, efficient laser operation.
- Mode-locking techniques are essential for generating ultrashort laser pulses.
Purpose of the Study:
- To demonstrate a gigahertz self-mode-locked Nd:GdVO4 laser generating high-order HG modes.
- To investigate the output characteristics of these HG modes.
- To convert HG beams into picosecond optical vortex pulses.
Main Methods:
- Utilized a Nd:GdVO4 laser medium.
- Achieved self-mode-locking operation at gigahertz repetition rates.
- Employed a cylindrical-lens converter for beam transformation.
Main Results:
- Generated TEM(0,m) modes (m=0-9) with average output powers ranging from 350-780 mW at 3.5 GHz.
- Mode-locked pulse widths were measured between 20-25 ps.
- Successfully converted HG beams into picosecond optical vortex pulses.
Conclusions:
- The Nd:GdVO4 laser system is capable of producing high-power, gigahertz, mode-locked HG beams.
- The conversion of HG beams to optical vortex pulses opens possibilities for novel applications.
- This work contributes to the development of advanced laser sources for ultrafast optics.
