Abstract – Optical sensing at long wavelengths presents significant opportunities and significant challenges. The longwave infrared and terahertz ranges are renowned for their potential to sense molecules in a variety of contexts, such as high-speed chemical imaging, disease detection, and environmental monitoring; however, their promise has yet to be fulfilled due to a lack of compact broadband sources and low-loss integrated photonics platforms. The most important sensing challenges require extremely wideband sources to achieve specificity and selectivity, but to date, there are no technologies that are compact, bright, and broadband. I will discuss some of the work of my group that seeks to address this challenge. First, I will discuss our development of quantum cascade laser-based frequency combs, light sources that fill the gap between broadband incoherent sources and lasers. I will also discuss how our experimental investigations of these combs led to my discovery of a new fundamental comb state that manifests in almost any laser at any wavelength, acting as the phase equivalent of passive modelocking , . Next, I will discuss our recent development of ultra-low-loss platforms for long wavelengths based on hybrid photonic integration, which allowed us to create optical resonators in the longwave infrared with quality factors 100 times better than the state-of-the-art , . This approach is fully wavelength-scalable and allows for the first efficient nonlinear optics at long wavelengths, serving as a foundational element for future applications in quantum sensing. Finally, I will discuss our development of ptychoscopy, a new sensing modality that allows for ultra-precise measurements of optical spectra. This measurement enables the measurement of remote signals with quantum-limited frequency resolution over the entire bandwidth of a comb, for the first time allowing incoherent spectra to be characterized with the precision techniques of combs . D. Burghoff, “Unraveling the origin of frequency modulated combs using active cavity mean-field theory,” Optica, vol. 7, no. 12, pp. 1781–1787, Dec. 2020. M. Roy, Z. Xiao, S. Addamane, and D. Burghoff, “Fundamental scaling limits and bandwidth shaping of frequency-modulated combs.” (in press, Optica) D. Ren, C. Dong, S. J. Addamane, and D. Burghoff, “High-quality microresonators in the longwave infrared based on native germanium,” Nat. Commun., vol. 13, no. 1, Art. no. 1, Oct. 2022. D. Ren et al., “Low-loss hybrid germanium-on-zinc selenide waveguides in the longwave infrared,” Nanophotonics, Jan. 2024. D. J. Benirschke, N. Han, and D. Burghoff, “Frequency comb ptychoscopy,” Nat. Commun., vol. 12, no. 1, p. 4244, Jul. 2021. Co-sponsored by: Advanced Science Research Center - the Graduate Center - City University of New York Speaker(s): David Burghoff Room: Auditorium, Bldg: Advanced Science Research Center CUNY, 85 St. Nicholas Terrace, New York, New York, United States, NY 10031, Virtual: https://events.vtools.ieee.org/m/447317

This is the second (virtual) meeting of the newly-formed Life Member Affinity Group (LMAG) in the IEEE Connecticut Section. We will be appointing CT LMAG Officers for 2025, share information about upcoming or past outreach activities, and plan the first in-person speaker event in early 2025. Any Connecticut Life Member is welcome to participate. Agenda: - Roll Call - Approve minutes of October 29 LMAG meeting - Appoint Officers for 2025 - Unfinished business - Action items from previous meeting - New business Virtual: https://events.vtools.ieee.org/m/444896

IEEE Reliability Society- Joint Boston/New Hampshire/Providence Chapter Adcom meeting. Speaker(s): , , , Agenda: Ahead of this meeting, please review Don's minutes and Justin's proposal & draft brochure. All are found in the "Media" section in the VTools event for last Adcom at https://events.vtools.ieee.org/m/434343 Agenda - Call to Order - Opening Remarks - Chapter Collabratec site: Boston/Providence/New Hampshire Jt Sections, RL07 - Officer Reports - Secretary - AdCom Meeting Minutes - Treasurer - Awards - Financials - Vice Chair - Technical Meeting Schedule - Potential Technical Meeting Presentations - Newsletter - Webmaster & Social Media - Website Status - Further discussion of Justin's proposal - Chair Report - Recent Technical Meeting Attendance - 13-NOV-2024 ESD Costly Controversial Myths byTed Dangelmayer - Upcoming Technical Meeting Registrations - 11-DEC-2024 Radiation Effects in Electronics: Brief Overview and History by Ethan Cascio - Old Business - MIT Lincoln Laboratory Appreciation / Thank You Plaque andPresentation - Proposed creation of IEEE Boston Reliability Chapter brochureTargeting the Younger Demographic - Facebook, Instagram, Twitter - Chapter banner - New Business - RSVPs for 11-DEC-2024 Radiation Effects in Electronics: Brief Overview and History by Ethan Cascio - Gary Kushner - "Thank you for the invite. I really appreciate them. I cannot make it this year. " - Mark Snyder - "It’s hard to believe I was chair almost 50 years ago. Unfortunately, I am unable to attend the meeting on 12/11. Please convey my warm regards to all the ‘youngsters’ in the chapter." - Aaron Dermarderosian - "I hope this finds you well! When possible and available virtually, I continue to try and attend the Boston Reliability chapter meetings as we definitely have one of the most active chapters in the US! Thanks for the invite, I am planning to attend this year virtually and am looking forward to the talk and seeing others again at the year-end event! If I recall, Charlie Recchia or possibly someone else on the AdCom knew of this program as they would share those facilities for modeling & testing single event upsets for computer systems at high altitude". - Officer Election – Open October 30 / Close December 4 - Communication from Mehdi Si Moussa ([email protected]), vice chair of the Worcester County section and Chair of the Microwave Chapter regarding hosting meetings. - Add the Worcester Reliability Chapter to the Boston/Providence/RI Reliability Chapter? - Policy Proposal Discussion - Should we create a chapter policy document, for example to contain the meeting voluntary illness self-reporting notification? - Proposed new policy: "We agree that as Officers and volunteers of the Joint IEEE Reliability Chapter of Boston, New Hampshire, & Providence, we will avoid any real or perceived impression that we have a political affiliation. Officers and other volunteers may take part in partisan political activities freely on their own personal time, but they must not do so in the course of their role and responsibilities for the Chapter, nor should they represent that they are acting for or on behalf of this Chapter, or give the appearance that they are representing the IEEE." - Menu and Logistics for 11-DEC-2025 Meeting - Schedule Next AdCom Meeting - TBD. - Closing Remarks - Adjournment Virtual: https://events.vtools.ieee.org/m/445583