Ms. Qiuying Ma Profile

Qiuying Ma

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Proceedings Article | 27 November 2023 Poster + Paper

Dual-comb spectroscopy for on-site spectroscopic detection

Yan Yang, Xinda Liu, Pengpeng Zhang, Qiuying Ma, Siyu Mou, Kai Ni

Proceedings Volume 12760, 127601C (2023) https://doi.org/10.1117/12.2687353

KEYWORDS: Spectroscopy, Combustion, Flame, Frequency combs, Fiber amplifiers, Error control coding, Spectral resolution, Signal to noise ratio, Picosecond phenomena, Nonlinear optics

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Dual-Comb Spectroscopy (DCS) is a novel high-performance spectral measurement technology. However, conventional DCS systems often rely on optical frequency comb seed sources, which have limited output power and are not capable of withstanding the substantial losses encountered during on-site detection. Additionally, their spectral range is often narrow and may not be suitable for the target gases. In this work, we demonstrate a high-power, wide-spectral-range dual-comb spectroscopy measurement system for on-site spectral detection. The system comprises two optical frequency combs with close repetition rates, utilizing erbium-doped fiber amplifiers and dispersion compensating fibers for power amplification and broadening of the spectrum. We successfully detect absorption spectra of multiple gases, demonstrating good agreement with the simulated spectrum from the HITRAN standard database. The spectral resolution can reach sub-picometer-level (approximately 0.45 pm). This work shows the potential of dual-comb spectroscopy technology transitioning from laboratory research to industrial on-site applications.

Proceedings Article | 24 November 2023 Paper

Highly integrated repetition frequency locking control system for optical frequency comb

Siyu Mou, Ning Ding, Qiuying Ma, Kai Ni, Qian Zhou

Proceedings Volume 12935, 129350Y (2023) https://doi.org/10.1117/12.3004973

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Optical frequency combs are increasingly being adopted in various measurement applications. However, the sensitivity of free-running optical frequency combs and the large size and complex connections required for locking equipment pose significant obstacles to their on-site application. To address these challenges, we present an integrated optical frequency comb repetition rate locking control system that greatly reduces the volume of the locking system.In this system, we firstly control the temperature of the resonator cavity to achieve a wide range of control over the effective length of the cavity. A temperature control box for the resonator cavity is designed, incorporating semiconductor cooling chips to regulate the temperature. Secondly, we employ piezoelectric ceramics to achieve small-scale stretching control of the resonator cavity length. These control methods work in synergy to achieve high-quality repetition rate locking. The use of a loop filter in the system establishes the dynamic performance of the repetition rate locking loop and effectively suppresses the high-frequency components of the phase discriminator output. Through testing of the research system, the temperature control system demonstrates a temperature control range of 20-40°C, with a temperature control accuracy of ±0.01°C. With the assistance of the temperature control system, the repetition rate locking system achieves a repetition rate locking duration of over 10 hours, with a fluctuation range of less than 5 mHz, an Allan deviation of 217 μHz@gate 1s, and a relative frequency stability of 3.89E-12.This system successfully achieves high-frequency stability and long-term locking of the optical frequency comb's repetition rate.

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