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 […]
Tag Archives: Frequency comb
Novel laser technology for microchip-size chemical sensors
Science Daily December 10, 2018 Researchers in Austria produced quantum cascade lasers which generate a frequency comb in the infrared range. With the help of an electrical signal of a specific frequency the quantum cascade lasers can be controlled to emit a series of light frequencies, which are all coupled together. The system is robust and can withstand temperature fluctuations, or reflections that send some of the light back into the laser. It can be easily miniaturized. The entire measuring system can be accommodated on a chip in millimeter format. The chip could be placed on a drone to measure […]