A method has been demonstrated for continuous tuning of double resonance-enhanced ultraviolet (UV) radiation of second harmonic generation in a dispersive beta barium borate (BBO) whispering gallery mode resonator. The tuning method is described in a recently published paper in Opt. Express. A patent is is pending for the tuning method as well.
Continuous tuning of double resonance in whispering gallery mode resonatorJanuary 28th, 2014
Old tricks for new applicationsDecember 3rd, 2013
Stellar intensity interferometer is proposed for observation of exoplanets and other dark space objects. Inspired by quantum ghost imaging and funded by NASA NIAC program, we have carried out an investigation of using star light and intensity interferometer technique to observe space objects such as exoplanets. The study addresses a novel aspect of stellar intensity interferometry, namely, the possibility to observe and characterize dark objects using distortions they impart on spatial coherence of thermal light sources. The initial results of the studied are now published in Physical Review A 88, 053837 (2013)
New phase matching method in micro resonators for wide-range efficient nonlinear frequency conversionOctober 31st, 2013
A wide-range efficient method for optical second harmonic generation based on a whispering gallery mode resonator made from crystalline beta barium borate has been reported. With a single BBO resonator, efficient second harmonic generation has been demonstrated over one octave wavelength range. The paper appears in Appl. Phys. Lett.
Better understanding of microcombs is achievedOctober 29th, 2013
A paper “Impact of cavity spectrum on span in microresonator frequency combs” by Ivan Grudinin, Lukas Baumgartel, and Nan Yu is published in Optics Express. Mode crossings, total cavity dispersion and Raman lasing are studied as they determine the behavior of microcombs.
Ghost imaging to search for space objectsFebruary 22nd, 2013
We are exploring the application of ghost-imaging-like techniques to astronomy, with the objective of detecting intensity-correlation signatures resulting from space objects of interest, such as exo-planets, gas clouds, and gravitational lenses. We show that the key aspect of being able to utilize ghost imaging in astronomy is the recognition that in interstellar imaging geometries the object of interest can act as an effective beam splitter, yielding detectable variations in the intensity-correlation signature. Some of the recent findings are summarized in Journal of Physics: Conference Series 414 (2013) 012037
Our primary mission is to conduct basic research as well as develop techniques and instruments that rely on quantum properties of light and atomic systems for frequency control and sensor applications with particular emphasis on applications in space. We are also interested in applying the new techniques to fundamental physics research. Current major activity areas include advanced atomic clocks, atom interferometer inertial sensors, whispering gallery mode resonators, and lasers and photonics.