Chin. Phys. Lett.  1999, Vol. 16 Issue (9): 651-652    DOI:
Original Articles |
Self-Frequency Doubling Laser Performance of Nd:GdCOB Crystal with a Phase-Matching Angle Out of the Principal Plane
LÜ Jun-hua;LI Guang-ming;LIU Jun-hai;ZHANG Shu-jun;CHEN Huan-chu;JIANG Min-hua;SHAO Zong-shu
National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
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LÜ, Jun-hua, LI Guang-ming et al  1999 Chin. Phys. Lett. 16 651-652
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Abstract The self-frequency doubling laser performance of Nd:GdCOB crystal cut in phase-matching direction (θ = 66.3°, Ф= 134.4 °) was compared with the crystal cut in the direction of (θ= 90 °, Ф = 46°). Results show that the former has a higher second-harmonic conversion efficiency than the latter. Using Ti:sapphire laser as pumping source, a maximum of 11.3mW of green light has been obtained with an incident power of 520mW. This corresponds to an optical-optical conversion efficiency of 2.2%. Laser threshold for self-frequency doubling operation is measured to be 1 mW. To our knowledge, this is the lowest threshold achieved so far.

Keywords: 42.55.Rz     
Published: 01 September 1999
PACS:  42.55.Rz (Doped-insulator lasers and other solid state lasers)  
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Jun-hua
LI Guang-ming
LIU Jun-hai
ZHANG Shu-jun
CHEN Huan-chu
JIANG Min-hua
SHAO Zong-shu
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