低噪声宽调谐1018nm分布式布拉格反射窄线宽单频光纤激光器

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关键词：低噪声；宽调谐；高稳定温控;PZT驱动；光纤激光器中图分类号：TN248;TN710 文献标志码：A doi：10.37188/CO.2025-0071 CSTR：32171.14.CO.2025-0071

Abstract： Addressing the urgent demand for 1018nm single-frequency seed sources in Rydberg microwave measurements， we have developed a wide tuning 1018nm single-frequency fiber laser with a linewidth of 810Hz and a relative intensity noise below -140dB/Hz .The laser employs a distributed Bragg reflector （DBR） structure with an 8-mm-long yterbium-doped fiber and incorporates a high-stability active temperature control system and a piezoelectric ceramic （PZT）-based fast frequency tuning device. The temperature control range was from 10∘C to 80∘C ，with the temperature fluctuation of the DBR resonance cavity was only ±0.0005∘C within 2 hours at a controlled temperature of 25∘C .Through experimental testing，the laser maintains single-longitudinal-mode output at 25∘C ，with a linewidth of 810Hz ，a temperature tuning range exceeding 0.9nm ， and a PZT-based fast-tuning range of up to 10GHz ， without any mode-hopping during the tuning process. The relative intensity noise of a single-frequency laser is -150dB/Hz in the low-frequency band of 1kHz ，and remains below -140dB/Hz for frequencies greater than 1.5MHz . This result shows that the laser achieves both low-noise output and wide tuning.

Key words： low noise; wide tuning; high stability temperature control; PZT driver; fiber lasers

1引言

里德堡原子微波测量技术由于其高灵敏度和宽带微波信号检测等优异性能在微波测量、光通信等领域得到广泛运用[1-5]。（剩余11571字）