Monolithic Y-branch distributed Bragg reflector diode laser at 633 nm for shifted excitation Raman difference spectroscopy

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-07-07 DOI:10.1007/s00340-025-08520-0

Aghigh Jalehdoost, Kay Sowoidnich, André Müller, David Feise, Katrin Paschke, Bernd Sumpf, Martin Maiwald

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Abstract

A dual-wavelength monolithic Y-branch distributed Bragg reflector diode laser at 633 nm is presented, which is suitable for shifted excitation Raman difference spectroscopy to effectively address fluorescence and background interference. The device provides 30 mW optical output power at an electrical power consumption of less than 1 W. At a spectral distance of 0.4 nm (10 cm⁻¹), both laser emission wavelengths show narrowband operation with spectral widths of 12 pm (0.3 cm⁻¹) and side mode suppression ratios of more than 40 dB. Performing shifted excitation Raman difference spectroscopy measurements on a highly fluorescent soil sample exemplarily showed the efficient separation of characteristic Raman signals of the soil constituents quartz and calcite from intense fluorescence interference with a 17-fold improvement in the signal-to-background noise ratio in comparison to the individual Raman measurements.

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单片y支分布布拉格反射二极管激光器在633 nm的位移激发拉曼差分光谱

提出了一种适用于位移激发拉曼差分光谱的633 nm双波长单片y支分布布拉格反射二极管激光器，可有效地解决荧光和背景干扰问题。该器件以小于1w的功耗提供30mw的光输出功率。在0.4 nm （10 cm−1）的光谱距离下，两种激光发射波长均表现为窄带工作，光谱宽度均为12 pm (0.3 cm−1)，侧模抑制比均大于40 dB。在高荧光土壤样品上进行位移激发拉曼差分光谱测量，可以有效地将土壤成分石英和方解石的特征拉曼信号从强荧光干扰中分离出来，与单个拉曼测量相比，信号与背景噪声比提高了17倍。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.