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Passively mode-locked radially polarized laser based on ceramic Nd:YAG rod
Huang Jianhong1, Deng Jing, Cao Yongge
1Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Optics Express
|March 4, 2011
Summary
This study presents a mode-locked, radially polarized laser using a ceramic neodymium-doped yttrium aluminum garnet (Nd:YAG) rod. Researchers achieved 10.6 W output power with a 45 MHz frequency and 75 ps pulse width.
Area of Science:
- Laser Physics
- Materials Science
Background:
- Radially polarized lasers offer unique beam characteristics.
- Ceramic Nd:YAG lasers are suitable for high-power applications.
Purpose of the Study:
- To demonstrate a mode-locked, radially polarized laser.
- To investigate the performance of a transversely pumped ceramic Nd:YAG laser.
Main Methods:
- Utilized a ceramic Nd:YAG rod transversely pumped by laser diode (LD) bars.
- Employed a semiconductor saturable absorber mirror for mode-locking.
- Characterized output power, frequency, pulse width, and beam quality.
Main Results:
- Achieved a maximum output power of 10.6 W.
- Operated at a frequency of 45 MHz with an average pulse width of 75 ps.
- Measured a beam quality factor (M2) of 2.11.
Conclusions:
- Successfully demonstrated a mode-locked, radially polarized laser system.
- The ceramic Nd:YAG laser shows potential for high-power, ultrashort pulse generation.
- Further optimization could enhance beam quality and power efficiency.
