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Generation of very flat optical frequency combs from continuous-wave lasers using cascaded intensity and phase modulators driven by tailored radio frequency waveforms

机译:使用级联的强度和相位调制器由定制的射频波形驱动,从连续波激光器产生非常平坦的光学频率梳

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摘要

We demonstrate a scheme based on a cascade of lithium niobate intensity and phase modulators driven by specially tailored RF waveforms to generate an optical frequency comb with very high spectral flatness. In this Letter, we demonstrate a 10 GHz comb with 38 comb lines within a spectral power variation below 1 dB. The number of comb lines that can be generated is limited by the power handling capability of the phase modulator, and this can be scaled without compromising the spectral flatness. Furthermore, the spectral phase of the generated combs in our scheme is almost purely quadratic, which, as we will demonstrate, allows for high-quality pulse compression using only single-mode fiber.
机译:我们展示了一种基于铌酸锂强度和相位调制器的级联的方案,该级联由专门定制的RF波形驱动,以生成具有非常高的光谱平坦度的光学频率梳。在这封信中,我们演示了10 GHz梳状结构和38条梳状线,其频谱功率变化低于1 dB。可以产生的梳状线的数量受到相位调制器的功率处理能力的限制,并且可以在不损害频谱平坦度的情况下进行缩放。此外,在我们的方案中,生成的梳齿的频谱相位几乎是纯平方的,正如我们将演示的那样,仅使用单模光纤就可以实现高质量的脉冲压缩。

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