鈮酸鋰準相位匹配倍頻轉換藍、綠光雷射之研製

Quasi-Phase-Match Double Frequency Generation of Blue and Green Light Lasers

張永昌(Y.-C. Zhang)

《光學工程》 77期 (2002/03) Pp. 12-15

https://doi.org/10.30011/OE.200203.0003

摘要

本論文分為鈮酸鋰摻雜不同濃度的氧化鋅的效應、高電壓製作週期性區域反轉結構以及倍頻轉換三部分。當氧化鋅摻雜濃度為8mol.%時，其矯頑電場約為2.5kV/mm。運用適當的絕緣層結構以抑制邊緣電場與有效的控制反轉電流，可製作出週期為6.7及5.1μm的PPLN。使用製作出的PPLN可以得到波長為532nm的綠光輸出及490nm的藍光輸出，其external efficiency約為4.327%W^(-1)cm^(-2)、1.165%W^(-1)cm^(-2)。

關鍵字

準相位匹配 ； 非線性頻率轉換 ； 鈮酸鋰摻雜氧化鋅

並列摘要

This article is organized into three sections: (1) zinc oxide doping effects in congruent grown lithium niobate, (2) fabrication of periodically-poled lithium niobate, (3) second harmonic generation on quasi-phase matched PPLN. The threshold and intern al field is found as low as 2.5 and 0.5 k V /mm, resultant on 8 mo l % ZnO doped LiNbO3. Using suitable dielectric layer, and control the poling current, we have successed in fabricating 3 mm long PPLN on 500 μ m-thick substrates with period 5.1 μ m. In SHG of PPLN at fundamental pumping wavelength 1064 nm and 980 nm, we can generate green laser with extern al efficiency η=4.327 %W^(-1) cm^(-2), and blue laser with η=1.165 %W^(-1) cm^(-2)

並列關鍵字

PPLN