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Spectral linewidth narrowing and tunable two-color laser operation of two diode laser arrays

机译:两个二极管激光器阵列的谱线宽度变窄和可调谐双色激光器操作

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摘要

We propose and implement a common external cavity to narrow spectral linewidth of two broad-area laser diode arrays (LDAs) and align their center wavelengths. The locked center wavelength of two LDAs can be tuned in the range of approx10 nm by tuning the tilted angle of the diffraction grating. The output beams of two LDAs are spatially overlapped through the polarization beam splitter of the common external cavity, and the total output power equals the power of two LDAs. The center wavelength of each LDA can be independently tuned by shifting the corresponding fast-axis collimation lens. As a result, the high-power two-color LDA operation is demonstrated with the tunable wavelength difference of up to 2 nm (approx1 THz).
机译:我们提出并实现了一个公共的外部腔体,以缩小两个广域激光二极管阵列(LDA)的光谱线宽并对齐其中心波长。通过调整衍射光栅的倾斜角度,可以将两个LDA的锁定中心波长调整在大约10 nm的范围内。两个LDA的输出光束通过公共外腔的偏振分束器在空间上重叠,总输出功率等于两个LDA的功率。每个LDA的中心波长可以通过移动相应的快轴准直透镜来独立调整。结果,证明了高功率双色LDA操作具有高达2 nm(约1 THz)的可调波长差。

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