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 article, the effect of a mild form of optical injection on the bias voltage and optical spectrum of a Fabry-Perot-type AlGaAs laser has been studied, at small frequency detuning between the injection and the injected laser, injection locking is observed.
Abstract: The effect of a mild form of optical injection on the bias voltage and optical spectrum of a Fabry-Perot-type AlGaAs laser has been studied. At small frequency detuning between the injection and the injected laser, injection locking is observed. The change in bias voltage, as a function of detuning, is dispersive-like and asymmetric, From the asymmetry, the alpha -parameter of the laser is determined. When the detuning is increased beyond the locking range, the effect of optical injection on bias voltage remains noticeable. Additional dispersive-like structures appear around the relaxation oscillation frequency. In the optical spectrum, four-wave mixing and reduced damping of the relaxation oscillations are observed. >
18 citations
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TL;DR: In this paper, a neodymium-doped fiber laser has been actively mode-locked to produce pulses shorter than 120 ps using an intracavity acousto-optic loss modulator.
Abstract: A neodymium-doped fibre laser has been actively mode-locked to produce pulses shorter than 120 ps using an intracavity acousto-optic loss modulator. The laser operated at 1.088 mu m at an average power of 5 mW when pumped by an injection-locked diode array, which coupled approximately 40 mW of 0.82 mu m into the fibre. A peak pulse power of 1 kW was obtained in Q-switched operation.
18 citations
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25 Nov 2008TL;DR: In this paper, the authors demonstrate injection locking of a radiation pressure driven optomechanical oscillator through external optical modulation of the optical pump power near the oscillator's frequency.
Abstract: We demonstrate injection locking of a radiation pressure driven optomechanical oscillator through external optical modulation of the optical pump power near optomechanical oscillation frequency.
18 citations
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TL;DR: In this article, the authors demonstrate frequency locking and control of an RTD oscillating at f 0 ∼ 550 GHz, via radiative injection of a weak sinusoidal subharmonic signal at f0/2.
Abstract: Phase and frequency control of resonant tunneling diode (RTD) based terahertz oscillators are major challenges in realizing coherent signal sources for arrayed applications, such as spatial power combining, beam steering, or multi-in multi-out systems. In this letter, we demonstrate frequency locking and control of an RTD oscillating at f 0 ∼ 550 GHz, via radiative injection of a weak sinusoidal subharmonic signal at f 0/2. Precise frequency control, within the locking range of around 2 GHz, is demonstrated. A peak output power enhancement of 14 dB in the whole locking range, compared to the free running oscillator, is achieved. Furthermore, occurrence of phase locking is identified by the spectral linewidth reduction, quantifiable in the full-width at half-maximum parameter. A signal linewidth of 490 Hz was achieved in locked operation.
18 citations
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27 Jul 1981
TL;DR: In this paper, a system for providing a single pulse of laser oscillator radiation of broad spectral range operative to excite a plurality of modes of a ring laser operating as an injection-locked oscillator is presented.
Abstract: A system for providing a single pulse of laser oscillator radiation of broad spectral range operative to excite a plurality of modes of a ring laser operating as an injection locked oscillator. In order to provide injection locking of the ring oscillator at multiple modes, a pump laser for the laser oscillator has its cavity length substantially similar to that of the laser oscillator thereby producing partial mode locking of the laser oscillator by amplitude modulation of the pump laser. In this manner the laser oscillator provides a single pulse of mode rich frequencies which are chosen within the band desired in the ring laser. This pulse continuously circulates within the cavity of the laser oscillator. The output of the laser oscillator through an output mirror thus forms a series of pulses separated in time by the roundtrip delay of the laser oscillator cavity. A single such pulse is selected by Pockels cell gating for injection into the ring oscillator. The segregation of the single pulse insures broad spectral content to that pulse as applied to the injection locked oscillator with a substantially uniform amplitude range. The single pulse is effective to excite a plurality of modes in the injection locked oscillator as is desired for the application of isotope separation.
18 citations