Spin torque oscillator (STO) has been attracting a great deal of attention as a candidate for the next generation microwave signal sources for various modern electronics systems since its advent. However, the phase noise of STOs under free running oscillation is still too large to be used in practical microwave applications, thus an industrially viable means to stabilize its oscillation has bee...

We describe and demonstrate a novel device in which a microwave oscillation and an optical oscillation are generated and directly coupled with each other. With the mutual influence between the microwave and the optical oscillations, we project that this device is capable of simultaneously generating stable optical pulses down to the subpicosecond level and spectrally pure microwave signals at f...

We describe a novel oscillator that converts continuous light energy into stable and spectrally pure microwave signals. This light-induced microwave oscillator (LIMO) consists of a pump laser and a feedback circuit, including an intensity modulator, an optical fiber delay line, a photodetector, an amplifier, and a filter. We develop a quasilinear theory and obtain expressions for the threshold ...

We proposed a 2.4/5.15 GHz dual-band voltagecontrolled oscillator which consists of a voltage-controlled oscillator and an injection-locked oscillator. Its upper and lower band frequencies are 4.48 5.86 GHz and 2.24 2.93 GHz, respectively. With the power consumption of 3.2 mW, their phase noises are 115 and 121 dBc/Hz at 1 MHz offset. VC 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 5...

We report on microwave signal-mixing functionality for a fiber-based optoelectronic oscillator. Two wavelength division multiplexed (WDM) channels carrying RF signals at 1320 and 1312 nm are simultaneously upconverted/downconverted by the fiber-based optoelectronic oscillator. The conversion efficiency is found to be approximately −8 dB, and the incoming signals have no effects on the local osc...

Chaotic signals must have specific characteristics in order to be used in certain applications. One of them is band-limited power spectrum. An approach to design of chaotic sources with band-limited feature is proposed. Realization of the approach in microwave band is demonstrated.

We report measurements of synchronization in two nanomechanical beam oscillators coupled by a mechanical element. We charted multiple regions of frequency entrainment or synchronization by their corresponding Arnold's tongue diagrams as the oscillator was driven at subharmonic and rational commensurate frequencies. Demonstration of multiple synchronized regions could be fundamentally important ...

We have performed microwave reflection experiments on a charge-phase qubit coupled to an LC oscillator. We find that the system behaves like an artificial molecule showing vibronic sideband transitions. The reflected signal is determined by a combination of the Franck-Condon principle and resolved-sideband cooling or heating of the oscillator.

Abstract: In this paper, a microwave chaotic oscillator with symmetric active load is presented. Compared to the classical Differential bipolar Chaotic Colpitts Oscillator (DCCO) produces anti-phase dual output carriers with intense chaotic behaviour, better linearity and very good encryption capabilities. Advanced Design System (ADS) 2008 Update 1 simulations performed up to 30 GHz, which demo...

The optical fiber used as a microwave delay line exhibits high stability and low noise and makes accessible a long delay (& 100 μs) in a wide bandwidth (≈ 40 GHz, limited by the optronic components). Hence, it finds applications as the frequency reference in microwave oscillators and as the reference discriminator for the measurement of phase noise. The fiber is suitable to measure the oscillat...