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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Si3N4 Waveguide-Coupled Microdisk Resonators with a Quality Factor of 107
摘要： We design and fabricate dispersion-engineered ~830nm-thick Si3N4 waveguide-coupled microdisks. Our resonators show a loaded quality (Q)-factor of ~1×107. We observe optical parametric oscillations in a 345μm-radius microdisk with a threshold pump power of ~50 mW in the waveguide.
关键词： Stoichiometric Si3N4 micordisks,optical parametric oscillations,whispering-gallery modes,high-Q resonators
更新于2025-09-16 10:30:52
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NEW STABILIZATION TECHNIQUE TO PREVENT PARAMETRIC OSCILLATIONS IN A 35 W C-BAND ALGAN/GAN MMIC HIGH POWER AMPLIFIER
摘要： In this paper, a novel stabilization scheme to prevent parametric oscillations in power amplifiers is presented. Based on a new oscillation detection approach, the inductive degeneration technique was used, for the first time, to successfully stabilize a high-power amplifier and prevent parametric oscillations. A 0.15 μm AlGaN/GaN Microwave Monolithic Integrated Circuit high power amplifier operating at 5.8 GHz with 10% fractional bandwidth was designed and successfully stabilized using this approach. The proposed (4.7 × 3.7) mm2 three-stage amplifier achieves a saturated output power of 35 W with 29% power added efficiency and a large-signal gain of 26 dB.
关键词： AlGaN/GaN,MMIC,high power amplifier,stabilization technique,parametric oscillations
更新于2025-09-10 09:29:36