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SUMMARY:POB Seminar -  Lithium niobate photonics for UV astronomical spect
 rograph calibration **Join EPC  at General Assembly**
DTSTART:20250306T181500
DTSTAMP:20260525T100724Z
UID:8e46e05ce97312f1be8e469da3f5f360a2e2d22fef3df03184230cb1
CATEGORIES:Conferences - Seminars
DESCRIPTION:Furkan Ayhan\n The EPFL Photonics Chapter (EPC) is very ple
 ased to announce and cordially invite you to our monthly ‘Pizza-Optics-
 Beer’ (POB) seminar on March 6th\, at 18:15 in room ELD 120.\n\n\nT
 his month we will have the pleasure to host Furkan Ayhan - doctoral assi
 stant in Advanced Nano-electromechanical Systems Laboratory with the pres
 entation entitled:\n\n        "Lithium niobate photonics for UV as
 tronomical spectrograph calibration"\n\n\nThe talk will be followed by the
  General Assembly of our association\, and the apero (pizza&beer).\n\nFor 
 organizational purposes (if you want to eat pizza!)\, please confirm your
  participation using this Doodle.\nDon’t hesitate to extend the invita
 tion to any postdoc and colleague!\n\nHope to see you there\,\nThe team of
  the EPFL Photonics Chapter\n\n\n\nAbstract:\nPrecise astronomical spectro
 scopy is a cornerstone of modern astrophysics\, enabling groundbreaking di
 scoveries from exoplanet detection to fundamental tests of physics. The ac
 curacy of these instruments relies on calibration sources\, and laser freq
 uency combs\, commonly known as astrocombs\, have emerged as a promising a
 lternative for achieving unprecedented wavelength precision. Extending cal
 ibration into the ultraviolet (UV) regime with astrocombs\, however\, pres
 ents significant challenges due to strong material dispersion and the intr
 icacies of nonlinear frequency conversion.\nThis talk details how chip-int
 egrated\, highly nonlinear lithium niobate photonic devices engineered wit
 h nano-fabricated waveguides and tailored poling patterns enable efficient
  UV astrocomb generation via cascaded harmonic processes. By combining a r
 obust telecommunication-wavelength 18 GHz electro-optic comb with periodic
 ally poled lithium niobate waveguides\, spectrograph calibration below 400
  nm was demonstrated for the first time. This approach leverages the stron
 g quadratic nonlinearity of lithium niobate and sub-micron modal confineme
 nt to overcome dispersion and low pulse energy limitations\, paving the wa
 y for enhanced calibration precision in next-generation astronomical spect
 rographs.\n\n\n\nYou don't know POBs?\nPOBs (Pizza-Optics-Beer) are monthl
 y seminars organized by the student association EPFL Photonics Chapter.\nA
  PhD or a postdoc gives a 20-minutes presentation about his/her research i
 n photonics. Discussions continue informally around pizza and beers!\nThe 
 event is free and open to anyone.\n\n\nWhat do we at EPFL Photonics Chapt
 er?\nWe bring together photonics enthusiasts on campus through a variety o
 f events\, including monthly pizza-optics-beer seminars\, barbecues\, hike
 s\, annual photonics workshop at ForumEPFL...\nAll this with the financial
  support from EDPO\, Optica\, SPIE. and SwissPhotonics.\n\n\nJoin us at Ge
 neral Assembly!\nThe General Assembly is open to everyone. Joining EPC as 
 a committee member is a great chance to have closer connections to your pe
 ers in academia and industry. As a member\, you will have funding to invit
 e speakers from around the world and organize social activities. You may a
 lso benefit from travel grants and registration fee waivers. \n\n\nIf you
  want to receive our newsletter (events\, updates\, and more...)\n\n© 202
 4 EPFL\n\n\nWe thank the Doctoral Program in Photonics (EPDO)\, the Socie
 ty of Photo-Optical Instrumentation Engineers (SPIE.)\, Optica and Swis
 sPhotonics for their support.\n \n\n 
LOCATION:ELD 120 https://plan.epfl.ch/?room==ELD%20120
STATUS:CONFIRMED
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