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New Insight into Nonlinear Optical Resonators Unlocks Door to Numerous Potential Applications
Optical resonators, which circulate and confine light (for instance in lasers), are currently used in a variety of applications of all sizes-from pinpoint light sources smaller than the width of a human hair to kilometer-scale sensing devices such as the Laser Interferometer Gravitational-wave Observatory (LIGO) experiment that detects gravitational waves.
Devices known as optical parametric oscillators are among the widely used nonlinear resonators in optics; they are “nonlinear” in that there is light flowing into the system and light leaking out, but not at the same wavelengths. Though these oscillators are useful in a variety of applications, including in quantum optics experiments, the physics that underpins how their output wavelength, or spectrum, behaves is not well understood.
If you are like many getting ready to register for COVID vaccines in New Hampshire, the process can seem a bit overwhelming. The Conway Public Library provides public computer access as well as Chromebooks which may be borrowed with an active Conway Library card. If you are having difficulties completing an online registration form, please feel free to ask a librarian for assistance. Conway librarians have been very happily busy helping patrons to sign up for vaccines. The Middle East, the next New Hampshire Humanities-supported event for the Conway Library, will take place virtually on Tuesday, March 2, at 6:30 p.m. The term Middle East is a changing geopolitical concept. Throughout recent history, this term referred to a political, a cultural and a geographical region with no clear boundaries. Moreover, this concept serves to generate stereotypes and misunderstanding. This multimedia presentation by Mohamed Defaa provides an analytical framework to understand the histories, so
If you drive a car with a featureless stereo system, you may feel compelled to toss it into the trash and get something better. Pioneer, Kenwood and Alpine are some of the big names in aftermarket car audio. Now, Boss Audio Systems is angling for a spot among the big guys with its latest head unit, the Elite BE950WCPA.
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Full Disclosure: Boss Audio Systems sent me this system to test out, offering to install the unit into my car. I opted to do it myself. I purchased a wiring harness and a dash kit, then installed it into my 2012 Smart Fortwo Passion Coupe off-road car. I’ve had it a couple of months and tested it with iOS and Android.)