Topic
Injection locking
About: Injection locking is a research topic. Over the lifetime, 4567 publications have been published within this topic receiving 60942 citations.
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TL;DR: In this paper, a V-band 1/2 frequency divider using harmonic injection-locked oscillator was developed using 0.15-/spl mu/m GaAs pHEMT process, which showed a maximum locking range of 7.4 GHz under a low power dissipation of 100 mW.
Abstract: A V-band 1/2 frequency divider is developed using harmonic injection-locked oscillator. The cross-coupled field effect transistors (FETs) and low quality-factor microstrip resonator are employed as a wide-band oscillator to extend the locking bandwidth. The second harmonic of free-running oscillation signal is injected to the gates of cross-coupled FETs for high-sensitivity superharmonic injection locking. The fabricated microwave monolithic integrated circuit frequency divider using 0.15-/spl mu/m GaAs pHEMT process showed a maximum locking range of 7.4 GHz (from 65.1 to 72.5 GHz) under a low power dissipation of 100 mW. The maximum single-ended output power was as high as -3 dBm.
19 citations
19 citations
TL;DR: In this article, the authors presented a microwave frequency standard based on coherent population trapping (CPT) in the 87Rb D1 line, which was obtained using two Raman lasers with a 6.8 GHz frequency offset by injection locking of a master laser to a slave laser.
Abstract: We present a microwave frequency standard based on coherent population trapping (CPT) in the 87Rb D1 line. The CPT spectrum is obtained using two Raman lasers with a 6.8 GHz frequency offset by injection locking of a master laser to a slave laser. We have constructed an atomic clock employing a 5 cm long Rb vapor cell confined with 6.67 kPa neon buffer gas at 70 °C. Using this system, we improve the CPT contrast through the elimination of undesired off-resonant fields created by the direct modulation method. We measured the frequency shift of the CPT signal as a function of the temperature of the Rb cell and estimated it to be approximately 1.3 ×10−9/K. The frequency of a 10 MHz crystal oscillator has been stabilized to the CPT spectrum between the two ground states in 87Rb. The relative frequency stability is approximately 2.3×10−12 for an average time of 68 s.
19 citations
Patent•
14 Feb 196719 citations
TL;DR: In this paper, a new spectral component near the eigenfrequency, associated with discrete phase jumps, is observed on the injected laser spectrum, and the effect of noise on injection locking is analyzed.
Abstract: Some clarifying simulation results concerning the effect of noise on injection locking are presented and analysed. A new spectral component near the eigenfrequency, associated with discrete phase jumps, is observed on the injected laser spectrum. This phenomenon, not appreciable if the noise is not taken into account, has also been observed in recent experimental works, with very similar reported results.
19 citations