• Journal of Semiconductors
  • Vol. 42, Issue 4, 041301 (2021)
Hao Sun, Mostafa Khalil, Zifei Wang, and Lawrence R. Chen
DOI: 10.1088/1674-4926/42/4/041301 Cite this Article
Hao Sun, Mostafa Khalil, Zifei Wang, Lawrence R. Chen. Recent progress in integrated electro-optic frequency comb generation[J]. Journal of Semiconductors, 2021, 42(4): 041301 Copy Citation Text show less

Abstract

Optical frequency combs have emerged as an important tool enabling diverse applications from test-and-measurement, including spectroscopy, metrology, precision distance measurement, sensing, as well as optical and microwave waveform synthesis, signal processing, and communications. Several techniques exist to generate optical frequency combs, such as mode-locked lasers, Kerr micro-resonators, and electro-optic modulation. Important characteristics of optical frequency combs include the number of comb lines, their spacing, spectral shape and/or flatness, and intensity noise. While mode-locked lasers and Kerr micro-resonators can be used to obtain a large number of comb lines compared to electro-optic modulation, the latter provides increased flexibility in tuning the comb spacing. For some applications in optical communications and microwave photonics, a high degree of integration may be more desirable over a very large number of comb lines. In this paper, we review recent progress on integrated electro-optic frequency comb generators, including those based on indium phosphide, lithium niobate, and silicon photonics.
Hao Sun, Mostafa Khalil, Zifei Wang, Lawrence R. Chen. Recent progress in integrated electro-optic frequency comb generation[J]. Journal of Semiconductors, 2021, 42(4): 041301
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