Srinivasan Research Group

The DAMOP Annual Meeting is from June 3 through June 7 in Forth Worth, Texas, and our lab has a couple of talks at the conference.  Please see the image for more information.

CLEO (Conference on Lasers and Electro-Optics) is May 5-10 in Charlotte, NC, and our lab and its collaborators have several talks.  Please see the image for a list. 

With a team of international collaborators, we have published an article in Nature Photonics that describes the investigation of a new type of cavity soliton frequency comb.

Chip-based devices known as frequency combs, which measure the frequency of light waves with unparalleled precision, have revolutionized time keeping, the detection of planets outside of our solar system and high-speed optical communication.
Now, scientists at the National Institute of Standards and Technology (NIST) and their collaborators have developed a new way of creating the combs that promises to boost their already exquisite accuracy and allow them to measure light over a range of frequencies that was previously inaccessible. The extended range will enable frequency combs to probe cells and other biological material.
The new devices, which are fabricated on a small glass chip, operate in a fundamentally different way from previous chip-based frequency combs, also known as microcombs.

Researchers at JQI and the National Institute of Standards and Technology (NIST) have developed standards and calibrations for optical microscopes that allow quantum dots to be aligned with the center of a photonic component to within an error of 10 to 20 nanometers (about one-thousandth the thickness of a sheet of paper). Such alignment is critical for chip-scale devices that employ the radiation emitted by quantum dots to store and transmit quantum information.

Our lab has several talks at the upcoming SPIE Photonics West conference in San Francisco from Jan 27 - Feb 1, 2024. If you are at the conference, please come check out our talks! 

Humanity’s desire to measure time more and more accurately has been a driving force in technological development, and improved clocks and the innovations behind them have repeatedly delivered unexpected applications and scientific discoveries. For instance, when sailors needed high precision timekeeping to better navigate the open seas, it motivated the development of mechanical clocks. And in turn, more accurate clocks allowed better measurements in astronomy and physics. Now, clocks are inescapable parts of daily life, but the demands of GPS, space navigation and other applications are still motivating scientists to push timekeeping to new extremes.

We have published a paper in Nature describing the all-optical synchronization of a microresonator soliton to an external reference laser. This provides a passive, electronics-free approach to comb-laser locking, which is a fundamental step in microcomb use in a variety of applications.