Injection locking

About: Injection locking is a research topic. Over the lifetime, 4567 publications have been published within this topic receiving 60942 citations.

Synchronizing first oscillator with second oscillator used for evaluating output signals of rotating rate sensors by determining response of first oscillator determined for formation of difference signal from response

Abstract: Two symmetrical frequencies and/or phase-shifted signals are produced for oscillation of a second oscillator (20) and for exciting of a first oscillator (10) with these signals. The response of the first oscillator (10) is determined for formation of a difference signal from the response. The frequency and/or the phase of the first oscillator (10) is then formed depending on the difference signal. Independent claims are included for: (a) a device for synchronizing a first oscillator with a second oscillator; and (b) a rotating rate sensor with a signal processing device.

Spectral narrowing of a flashlamp-pumped high-energy dye laser by two-stage injection locking

Abstract: This paper proposes a new scheme of multistage injection locking controlled by a narrow-band CW dye laser to obtain spectral narrowing of a high-energy flashlamp-pumped dye laser (FLPL). The spectrum of FLPL with an output energy of 23 J was successfully narrowed to 0.7 GHz by this method. A narrow-band CW radiation was injected into the cavity of a small FLPL, then its locked output emission was injected into the cavity of the high-energy FLPL. With a CW injected power of 15 mW, about 70 percent of the output energy of the final laser was concentrated into the same spectral region as the injected CW radiation. The effective power gain obtained was as large as 4 \times 10^{8} . Using coupled rate equations based on a simplified model, the injection-locking phenomena were analyzed. This model makes it possible to derive the locking efficiency as a function of the injected power in an explicit form, and gives an insight for experiments. Some performances of injection-locked operation were studied experimentally.

Optical injection locking-based amplification in phase-coherent transfer of optical frequencies

Abstract: We demonstrate the use of an optical injection phase locked loop (OIPLL) as a regenerative amplifier for optical frequency transfer applications. The optical injection locking provides high gain within a narrow bandwidth (<100 MHz) and is capable of preserving the fractional frequency stability of the incoming carrier to better than 10(-18) at 1000 s. The OIPLL was tested in the field as a mid-span amplifier for the transfer of an ultrastable optical carrier, stabilized to an optical frequency standard, over a 292 km long installed dark fiber link. The transferred frequency at the remote end reached a fractional frequency instability of less than 1×10(-19) at averaging time of 3200 s.

Adjustable Chirp Injection-Locked 1.55-μm VCSELs for Enhanced Chromatic Dispersion Compensation at 10-Gbit/s

Abstract: We demonstrate adjustable negative chirp from a directly-modulated, injection-locked 1.55-μm VCSEL by controlling the injection parameters. Chromatic dispersion tolerance is enhanced by greater than 10× at 10-Gb/s compared to that of a free-running VCSELs.

Wideband and high frequency stabilization of an injection-locked Nd:YAG laser to a high-finesse Fabry Perot cavity.

Abstract: High frequency stabilization of a 2.2-W injection-locked laser-diode-pumped Nd:YAG laser to a high-finesse optical cavity has been realized by frequency control of the master laser. With the help of an external electro-optical modulator, the feedback bandwidth was extended to 1 MHz and the frequency noise relative to the reference cavity was suppressed to 3×10-4 Hz/Hz1/2 below 1 kHz. This feedback laser system is an ideal laser source for gravitational wave detectors, which require both ultralow frequency noise and high output power.