【摘要】：通過(guò)單次穿過(guò)PPMgO:LN晶體產(chǎn)生了2.06 W的780 nm可調(diào)諧的連續(xù)倍頻光.采用1560 nm的分布反饋式(DFB)半導(dǎo)體激光器、光柵外腔半導(dǎo)體激光器(ECDL)和分布反饋式摻鉺光纖激光器(DFB-EDFL)分別作為摻鉺光纖放大器(EDFA)的注入光源,所用的EDFA具有保持窄線寬的功能,因此可以忽略它對(duì)基波線寬的展寬.研究了激光線寬對(duì)單次通過(guò)PPMg O:LN晶體的倍頻效率的影響.控制三臺(tái)激光器各自注入EDFA的功率一致,同時(shí)也保持EDFA的輸出功率.在基波功率為12.42 W時(shí),使用DFB半導(dǎo)體激光器注入EDFA時(shí)得到了1.36 W的780 nm倍頻光輸出,轉(zhuǎn)換效率為11.0%;使用ECDL作為種子源時(shí)得到了1.78 W的780 nm倍頻光輸出,轉(zhuǎn)換效率為14.3%;使用DFB-EDFL作為種子源時(shí)得到了2.06 W的780 nm倍頻光輸出,轉(zhuǎn)換效率為16.6%.測(cè)得三臺(tái)種子激光器的線寬分別為1.2 MHz(DFB),200 k Hz(ECDL)和600 Hz(DFB-EDFL).線寬越窄,倍頻效率越高,實(shí)驗(yàn)結(jié)果與理論分析一致.
[Abstract]:Through a single pass through the PPMgO:LN crystal, a 2.06 W tunable continuous frequency doubling light of 780 nm has been produced. A 1560 nm distributed feedback (DFB) semiconductor laser, a grating external cavity semiconductor laser (ECDL) and a distributed feedback erbium-doped fiber laser (DFB-EDFL) are used as injection light sources for the erbium-doped fiber amplifier (EDFA), respectively. The EDFA used has the function of maintaining narrow linewidth, so it can be ignored to widen the fundamental linewidth. The effect of laser linewidth on the frequency doubling efficiency of single pass PPMg O:LN crystal is studied. Each of the three lasers is controlled to inject the same power into the EDFA while maintaining the output power of the EDFA. When the fundamental power is 12.42 W, the DFB semiconductor laser is injected into EDFA and the output power is 1.36 W, and the conversion efficiency is 11.0%. When ECDL was used as seed source, the conversion efficiency was 14.3% and the conversion efficiency was 14.3%, and the conversion efficiency was 16.6% when DFB-EDFL was used as seed source, and the output was 2.06 W, and the conversion efficiency was 16.6% when the seed source was used as seed source, and the conversion efficiency was 14.3% when the seed source was used as seed source. The linewidths of the three seed lasers are 1.2 MHz (DFB), 200 k Hz (ECDL) and 600 Hz (DFB-EDFL), respectively. The narrower the linewidth is, the higher the frequency doubling efficiency is, and the experimental results agree with the theoretical analysis.
【作者單位】： 量子光學(xué)與光量子器件國(guó)家重點(diǎn)實(shí)驗(yàn)室(山西大學(xué))山西大學(xué)光電研究所;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):61475091,11274213,61205215,61227902) 國(guó)家重大科學(xué)研究計(jì)劃(批準(zhǔn)號(hào):2012CB921601)資助的課題~~
【分類號(hào)】：O734

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