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Optical Frequency Comb

Compact Chips Advance Precision Timing for Communications, Navigation and Other Applications

Shrinking Technology, Expanding Horizons: Complete Article

National Institute of Standards and Technology, Boulder, CO, USA

Igor Kudelin, et. al

Department of Physics, University of Colorado Boulder, Boulder, CO, USA

Abstract: Numerous modern technologies are reliant on the low-phase noise and exquisite timing stability of microwave signals. Substantial progress has been made in the field of microwave photonics, whereby low-noise microwave signals are generated by the down-conversion of ultrastable optical references using a frequency comb^1,2,3. Such systems, however, are constructed with bulk or fibre optics and are difficult to further reduce in size and power consumption. In this work we address this challenge by leveraging advances in integrated photonics to demonstrate low-noise microwave generation via two-point optical frequency division^4,5. Narrow-linewidth self-injection-locked integrated lasers^6,7 are stabilized to a miniature Fabry–Pérot cavity⁸, and the frequency gap between the lasers is divided with an efficient dark soliton frequency comb⁹. The stabilized output of the microcomb is photodetected to produce a microwave signal at 20 GHz with phase noise of −96 dBc Hz⁻¹ at 100 Hz offset frequency that decreases to −135 dBc Hz⁻¹ at 10 kHz offset—values that are unprecedented for an integrated photonic system. All photonic components can be heterogeneously integrated on a single chip, providing a significant advance for the application of photonics to high-precision navigation, communication and timing systems.

Complete Article (PDF)

American Folk Music Standards

vv

Tree Care In Winter

The Future of Universities in a Block Chain World

Herbst Program for Engineering, Ethics & Society

Bibliography

“A Next Generation Smart Contract & Decentralized Application Platform” | Vitalik Buterin

“Fair and Robust Multi-Party Computation using a Global Transaction Ledger” | Aggelos Kiayias, Hong-Sheng Zhou, Vassilis Zikas

Original White Paper: Bitcoin

ראש השנה

Here is a general description of what you might find in the Colorado State University Jewish community:

Hillel Organization: Many universities, including CSU, have a Hillel organization, which is a Jewish student organization that provides a platform for Jewish students to connect, celebrate Jewish culture, and explore their faith. Hillel often organizes events, such as Shabbat dinners, holiday celebrations, and educational programs.
Jewish Student Groups: CSU may have various Jewish student groups or clubs where students with shared interests within the Jewish community can come together. These groups may focus on different aspects of Jewish culture, social activities, or advocacy.
Religious Services: Some universities with a significant Jewish population offer on-campus religious services, such as Shabbat services and High Holy Days observances, to accommodate students’ religious needs.
Cultural Events: The Jewish community at CSU might organize cultural events and activities, such as lectures, film screenings, and cultural festivals, to promote understanding and appreciation of Jewish heritage and traditions.

To get the most accurate and up-to-date information about the Colorado State University Jewish community, I recommend visiting the university’s website or contacting the relevant student organizations and offices on campus. Additionally, you can connect with current students or alumni who are part of the Jewish community at CSU to gain insights into their experiences and activities.

Rosh Hashanah

אָבִינוּ מַלְכֵּנוּ

Seeds of Prosperity

Standards Colorado

Mitchell Hall

More than 4,000 cadets gather for lunch inside Mitchell Hall at the U.S. Air Force Academy in Colorado Springs, Colo., Aug. 10, 2009. A staff of 200 food service professionals prepare nearly 13,000 meals per day for cadets throughout the academic year. (U.S. Air Force photo/Ann Patton)