Speaker: Ramiz Hamid
Title:Frequency Stabilized Quantum Oscillator and Applications
Date/Time: February 27, 2019 / 13:40 - 14:30
Place: FENS G035
Abstract : In this seminar, I will present microwave and optical clock technologies and application of these clocks in science and technology including our related activities in TÜBİTAK National Metrology Institute (UME). Presentation consists of three main parts. In the first and second parts, I will discuss the problems and applications related to the frequency and period of EM wave, which is possible to measure and generate with an uncertainty of 10 -13 – 10 -14 . In the third part I will discuss the amplitude of EM waves which is measured with a high uncertainty (10 -1 – 10 -2 ) that needs to be improved. In the first part, I will speak about the importance of EM waves with a high stability and frequency precision in science and technology. Here, I will present the results of the generation of the National Time and Frequency scale with an uncertainty of 10 -13 – 10 -14 using Cs atomic clocks and frequency standards operated at RF – MW spectrum and GPS satellite systems. Besides, time and frequency dissemination and its applications will be discussed. In the second part, I will present our laser sources in the optical spectral range of 532 nm – 3390 nm, laser frequency stabilization on atomic (Cs, Rb) and molecular (I 2 , CH 4 ) transitions with an uncertainty of 10 -11 – 10 -14 , influence of magneto-optical effects on the saturated atomic absorption spectrum. I will give our latest results related to Rb clock, frequency stabilized Yb-fiber femtosecond frequency comb and also low phase noise microwave generation based on femtosecond comb. The results related to the application of stabilized lasers for length and displacement measurement with a nanometer uncertainty will also be discussed.
BIO: Ramiz Hamid received the B.S. and M.S. degrees in physics from Moscow State University in 1985 and the Ph.D. degree in physics from the Lebedev Physics Institute in 1991. He has been with the National Metrology Institute (UME) of Turkey since 1993 and was the leader in development of the Time and Frequency, Wavelength Standards and Electromagnetic Compatibility Laboratories. He is currently the head of Time, Frequency and Wavelength Laboratory and also Deputy Director of UME. Ramiz involved in EURAMET activity since 1995 and 4 years (2013– 2017) he was Chair of Time and Frequency Technical Committee of the EURAMET. His research interests include laser spectroscopy, time and frequency and electromagnetic metrology, application of stabilized lasers in metrology
Contact: Emre Erdem & Emre Özlü & Erdinç Öztürk