High-Finesse Micro-Optical Fabry-Perot Cavity and Its Applications in Strongly Coupled Cavity Quantum Electrodynamics

Tiancai, 张天才 Zhang; Wei, 毋伟 Wu; Pengfei, 杨鹏飞 Yang; Gang, 李刚 Li; Pengfei, 张鹏飞 Zhang

doi:10.3788/aos202141.0127001

Cited by 3 publications

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“…The measured F-P cavity linewidth is ∼3.5 MHz, and the cavity finesse is 142. The intensity noise of the laser diode is close to the shot noise, and the phase noise is above its intensity noise [32]. Thus, we believe that the suppression mainly comes from the laser phase noise.…”

Section: Measurement Of the Laser Phase Noisementioning

confidence: 74%

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Narrow-Linewidth 852-nm DBR-LD with Self-Injection Lock Based on High-Finesse Optical Cavity Filtering

et al. 2023

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Narrow-linewidth lasers have a high spectral purity, long coherent length, and low phase noise, so they have important applications in atomic clocks, precision measurement, and quantum computing. We inject a transmitted laser from a narrow-linewidth (∼15 kHz) flat-concave Fabry–Perot (F-P) cavity made from ultra-low expansion (ULE) optical glass into an 852 nm distributed Bragg reflector-type laser diode (DBR-LD), of which the comprehensive linewidth is 1.67 MHz for the free running case. With an increase in the self-injection power, the laser linewidth gradually narrows, and the injection locking current range gradually increases. The narrowest linewidth measured by the delayed frequency-shifted self-heterodyne (DFSSH) method is about 365 Hz, which is about 1/4500 of the linewidth for the free running case. Moreover, to characterize the laser phase noise, we use a detuned F-P cavity to measure the conversion signal from the laser phase noise to the intensity noise for both the free running case and the self-injection lock case. The laser phase noise for the self-injection lock case is significantly suppressed in the analysis frequency range of 0.1–10 MHz compared to the free running case. In particular, the phase noise is suppressed by more than 30 dB at an analysis frequency of 100 kHz.

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Section: Measurement Of the Laser Phase Noisementioning

confidence: 74%

“…Suppose E in and E out are the input and output fields, respectively, E cav and E cav are the fields within the cavity at the incident and outgoing exit, respectively. From the input-output relationship, we can obtain the following equation [32]:…”

Section: The Detuned F-p Cavity Methods For Laser Phase Noise Measure...mentioning

confidence: 99%