High-precision optical phase-locking based on wideband acousto-optical frequency shifting

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2014,（2）
• 页码范围: 38-41
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201412.021402

摘要

We present a high-precision optical phase-locking based on wideband acousto-optical frequency shifting.Increasing the modulating bandwidth stabilizes the loop at a high loop gain,thus improving phase correction capability.An optical phase-locked loop with a wide control bandwidth is constructed.The closed-loop residual phase error is only 0.26° or smaller than λ/1000.The loop exhibits excellent correction capability for high-frequency noises.The correctable frequency range reaches 35 kHz when the noise amplitude is ±λ/2,and becomes even wider for smaller noise amplitudes.