激光技术
激光技術
격광기술
Laser Technology
2015年
6期
761-764
,共4页
光电子学%光电振荡器%相位噪声%谱线宽度%信噪比
光電子學%光電振盪器%相位譟聲%譜線寬度%信譟比
광전자학%광전진탕기%상위조성%보선관도%신조비
optoelectronics%optoelectronic oscillator%phase noise%spectral line-width%signal-to-noise ratio
为了改善光电振荡器相位噪声特性、提高光电振荡器性能，采用理论分析和实验验证的方法，研究了激光器线宽、光功率与光电振荡器相位噪声之间的关系。测试了激光器在功率相等、线宽不等情况下，光电振荡器所产生的微波信号的频谱特性和相位噪声特性；测试了给定线宽激光器在不等功率情况下，所产生的微波信号的相位噪声特性。结果表明，激光器线宽越窄、光功率越大，光电振荡器产生微波信号的频谱特性和相位噪声特性就越好；在频偏1 kHz以外，相位噪声受激光器线宽影响较小，受光功率影响较大。这一结果对改善光电振荡器相位噪声有一定的帮助。
為瞭改善光電振盪器相位譟聲特性、提高光電振盪器性能，採用理論分析和實驗驗證的方法，研究瞭激光器線寬、光功率與光電振盪器相位譟聲之間的關繫。測試瞭激光器在功率相等、線寬不等情況下，光電振盪器所產生的微波信號的頻譜特性和相位譟聲特性；測試瞭給定線寬激光器在不等功率情況下，所產生的微波信號的相位譟聲特性。結果錶明，激光器線寬越窄、光功率越大，光電振盪器產生微波信號的頻譜特性和相位譟聲特性就越好；在頻偏1 kHz以外，相位譟聲受激光器線寬影響較小，受光功率影響較大。這一結果對改善光電振盪器相位譟聲有一定的幫助。
위료개선광전진탕기상위조성특성、제고광전진탕기성능，채용이론분석화실험험증적방법，연구료격광기선관、광공솔여광전진탕기상위조성지간적관계。측시료격광기재공솔상등、선관불등정황하，광전진탕기소산생적미파신호적빈보특성화상위조성특성；측시료급정선관격광기재불등공솔정황하，소산생적미파신호적상위조성특성。결과표명，격광기선관월착、광공솔월대，광전진탕기산생미파신호적빈보특성화상위조성특성취월호；재빈편1 kHz이외，상위조성수격광기선관영향교소，수광공솔영향교대。저일결과대개선광전진탕기상위조성유일정적방조。
In order to optimize the phase noise characteristics and improve the performance of an optoelectronic oscillator ( OEO) , the relation among the phase noise of an OEO , the spectra line-width and optical power was studied by theoretical analysis and experimental verification .The spectral performance and phase noise of microwave signals generated by the OEO were measured respectively , under the conditions of equal optical power and different spectra line-widths.And then, phase noise of microwave signals was measured under the conditions of fixed spectral line -width and different laser power .The results indicate that the narrower spectral line-width and the higher laser power , the better phase noise and spectral characteristics of microwave signals.Furthermore, compared with the spectral line-width, the laser power has greater effect on phase noise beyond 1kHz frequency offset .The result is helpful for improving phase noise of photoelectric oscillator .
