Powerful and compact optical frequency combs provide unique opportunities

Phys.org  October 11, 2024
Enhanced nonlinear processes in microresonators have emerged as a mainstream comb-generating mechanism with compelling advantages in size, weight, and power consumption. The established understanding of gain and loss in nonlinear microresonators, along with recently developed ultralow-loss nonlinear photonic circuitry, has boosted the optical energy conversion efficiency of microresonator frequency comb (microcomb) devices from below a few percent to above 50%. In this review an international team of researchers (USA – Caltech, Harvard University, Sweden) summarized the latest advances in novel photonic devices and pumping strategies that contributed to these milestones of microcomb efficiency. The resulting benefits for high-performance integration of comb applications were discussed before summarizing the remaining challenges… read more. Open Access TECHNICAL ARTICLE

Definition of the microcomb efficiency and its limitations… Credit: eLight volume 4, Article number: 18, 10 October 2024

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