Phys.org February 23, 2022 A team of researchers in the US (NIST, University of Maryland) has produced a microcomb using two lasers, each generating a different frequency of light, instead of just one. They found that through a complex series of interactions with the soliton light circulating in the microring resonator, the second laser induced two new sets of teeth, or evenly spaced frequencies, that are replicas of the original set of teeth but shifted to higher and lower frequencies. The lower frequency set lies in the infrared part of the spectrum, while the other is at much high frequencies, […]
Tag Archives: Microcomb
Scientists build the smallest optical frequency comb to-date
Eurekalert February 11, 2019 Electrically-driven, photonic chip-based microcombs are inhibited by the required high threshold power and the frequency agility of the laser for soliton initiation. An international team of researchers (Switzerland, Russia) has built an integrated soliton microcomb operating at a repetition rate of 88 GHz using a chip-scale indium phosphide laser diode and the silicon nitride microresonator. At only 1 cm in size, the device is the smallest of its kind to-date. A small portion of the laser light is reflected back to the laser due to intrinsic scattering from the microresonator. This direct feedback helps to both […]