A novel technique has been developed to generate ultra-stable millimeter-wave signal by optical heterodyning of the output from two slave laser (SL) sources injection-locked to the sidebands of a frequency modulated (FM) master laser (ML). Precise thermal tuning of the SL sources is required to lock the particular slave laser frequency to the desired FM sidebands of the ML. The output signals f...

This paper presents a 30dBm (1W) class-E power amplifier projected in a standard 0.18-μm CMOS technology. The power amplifier (PA) consists in two differentials stages. The main stage employs a cascode class-E RF power amplifier with a self-biasing circuit. The driver stage uses the technique of Injection-Locking to substantially reduce the input power signal, maintaining a high gain. At 2.45 G...

Submitted for the MAR05 Meeting of The American Physical Society Interaction of Spin-Transfer Oscillators With AC Currents and Fields M.R. PUFALL, W.H. RIPPARD, S. KAKA, T.J. SILVA, S.E. RUSSEK — We have shown previously that a DC current flowing through a 40 nm point contact made to a spin valve structure induces high frequency, large-angle coherent magnetic precession. The precession frequenc...

This paper presents an ultra-wideband injection-locked frequency divider (ILFD) design which is applicable to a multi-applications system. A transformer-based multi-order resonator utilized in the ILFD attain flat phase response. The passive injection-boosted technique proposed increase injection signal amplitude and thus widen locking range. With resonator, demonstrates measured range of 50GHz...

Sub-carrier-multiplexed (SCM) fiber optic systems have received much attention for local access networks, fiber radios, and cable television distributions [l]. With SCM, multiple channels of analog videos and digital telephony/data can all be simultaneously transmitted by a single optical carrier and detected by the same photodetector. Direct modulation of semiconductor lasers is a simple, low-...

Short pulses are useful in a number of applications in optics, e.g., time resolved spectroscopy, sampling of fast electronics, and communications. This has led to a number of mode-locking techniques to obtain such pulses, for example acousto-optic, injection, synchronous-pump, collidingpulse mode-locking, and Kerr-lens mode-locking. Using the latter two techniques, pulses of less than 100 fs du...

The requirement for narrow linewidth lasers or short-loop propagation delay makes the realization of optical phase-lock loops using semiconductor lasers difficult. Although optical injection locking can provide low phase error variance for wide linewidth lasers, the locking range is restricted by stability considerations. Theoretical and experimental results for a system which combines both tec...

We report what is to our knowledge the first observation of synchronous coherent injection locking of an actively mode-locked extended cavity semiconductor laser to an external light pulse train. In the temporal domain, we observed experimentally and verified theoretically a significant narrowing of the output pulse of the mode-locked laser. In the spectral domain, we demonstrated experimentall...