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We generate single Kerr-cavity solitons from a 15 GHz silica resonator. These pulses are compressed in normal dispersion fiber and used to generate a coherent octave-spanning supercontinuum.
Dual-comb spectroscopy is demonstrated using microresonator soliton frequency combs by measuring the absorption spectrum of H13CN in the near-infrared. The results show the potential for a chip-based, high-precision spectroscopic system.
We demonstrate a frequency-stabilized, dual-Kerr microcomb that guides an integrated Vernier-laser optical frequency synthesizer, all derived from an RF clock. The synthesizer's stability is <10−12/τ with Hz-level tuning resolution across a 32 nm tuning range.
We introduce an architecture for optical-frequency synthesis using photonic-chip frequency combs and a heterogeneously integrated CW laser. The Kerr dual-comb that we describe offers a microwave-optical link to discipline the laser to an RF clock.
Temporal cavity solitons with a detectable repetition rate are generated in a high-Q silica microresonator. A technique for long-term stabilization of the soliton train is demonstrated and used to measure soliton properties for comparison with theory.
A monolithic micro cavity is used to detect rotations as low as 22 degrees/hour using counter-propagating laser fields. The proof-of-concept gyroscope features an 18mm silica-on-silicon disk resonator with an intrinsic Q factor over 200 million. Cascaded stimulated Brillouin lasing action produces the laser fields.
Nanometer sized Ni-dot/Ag/Pt metal coating films with different Ni-dot sizes were incorporated in InGaN based blue light emitting diodes as p-type reflection metal to enhance the extraction efficiency of blue light. For the reflectivity change from 84% to 93.7%, the optical output power of blue light before phosphor coating and the luminous flux of white light after phosphor deposition have improved...
High-Q disk resonators are used to frequency stabilize two fiber lasers. The improved phase noise of the devices is measured by heterodyne detection and compared to theoretical limits set by thermo-refractive noise.
In high concentration photovoltaic (HCPV) systems, III-V multijunction solar cells work under high concentration condition at a small size, normally less than 1cm2. In this case, the metal coverage ratio and the current density become larger than those in the case of flat-plate solar cells. Due to the high current density, combined with the sheet resistance of solar cells, most of currents reverse...
Recently a solar cell, one of the oldest photonic devices, draws lots of attention as an alternative method to generate clean electricity. This is mainly due to the concern about global warming, not to its economic availability. In fact the electricity cost generated by Si solar cell, typically ranged from 25 to 35 cents/kWh, is still far expensive compared to the that produce by fossil fuel. One...
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