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Biography
Chih-Kung Jen
Chih-Kung Jen (Chinese: 任之恭; pinyin: Rén Zhīgōng; August 15 or October 2, 1906 – November 19, 1995) was a Chinese physicist who emigrated to the U.S. and participated in some of the 20th century's major scientific, political and social developments in both the United States and China. Born in a mud house in a remote and largely illiterate village in China, he was awarded a scholarshi
  • 432
  • 09 Dec 2022
Biography
Heinz Maier-Leibnitz
Heinz Maier-Leibnitz (28 March 1911 in Esslingen am Neckar – 16 December 2000 in Allensbach) was a Germany physicist.[1] He made contributions to nuclear spectroscopy, coincidence measurement techniques, radioactive tracers for biochemistry and medicine, and neutron optics. He was an influential educator and an advisor to the Federal Republic of Germany on nuclear programs. During World War I
  • 767
  • 09 Dec 2022
Biography
Richard Gaitskell
Richard Jeremy Gaitskell (born May 2, 1965) is a physicist and professor at Brown University, and a leading scientist in the search for particle dark matter.[1] He is co-founder, a principal investigator, and co-spokesperson of the Large Underground Xenon (LUX) experiment, which announced world-leading[2][3] first results on October 30, 2013. He is also a leading investigator in the new LUX-Zepl
  • 434
  • 09 Dec 2022
Biography
Bruno Augenstein
Bruno Wilhelm Augenstein (March 16, 1923 – July 6, 2005) was a Germany -born mathematician and physicist who made important contributions in space technology, ballistic missile research, satellites, antimatter, and many other areas. Augenstein worked in the Aerophysics Laboratory at North American Aviation on diverse projects including weaponization of the V-2 rocket, a ramjet-powered vehic
  • 377
  • 09 Dec 2022
Biography
Heinrich Rubens
Heinrich Rubens (30 March 1865, Wiesbaden, Nassau, Germany – 17 July 1922, Berlin, Germany) was a German physicist. He is known for his measurements of the energy of black-body radiation which led Max Planck to the discovery of his radiation law. This was the genesis of quantum theory. After having attended realgymnasium Wöhlerschule in Frankfurt am Main, he started in 1884 to study electric
  • 456
  • 09 Dec 2022
Biography
Thomas Michael Donahue
Thomas Michael Donahue (23 May 1921, Healdton, Oklahoma – 16 October 2004, Ann Arbor, Michigan) was an American physicist, astronomer, and space and planetary scientist. Donahue graduated in 1942 from Rockhurst College in Kansas City and received in 1947 his PhD in physics from Johns Hopkins University, with an interruption of his graduate studies by WW II and service in the Army Signal Corps.
  • 351
  • 09 Dec 2022
Biography
Leroy Chang
Leroy L. Chang (Chinese: 張立綱; 20 January 1936 – 10 August 2008) was an experimental physicist and solid state electronics researcher and engineer. Born in China, he studied in Taiwan and then the United States, obtaining his doctorate from Stanford University in 1963. As a research physicist he studied semiconductors for nearly 30 years at IBM's Thomas J. Watson Research Center, New York
  • 703
  • 09 Dec 2022
Topic Review
Bragg Grating External Cavity Semiconductor Lasers
External cavity semiconductor lasers (ECSLs) usually refer to the gain chip based on the introduction of external optical components (such as waveguides, gratings, prisms, etc.) to provide optical feedback. By designing the type, position and structure of external optical components, the optical properties of SLs (such as center wavelength, linewidth, tuning range, side-mode suppression ratio (SMSR), etc.) can be changed. Bragg grating external cavity semiconductor laser (BG-ECSL) is a device with a specific optical element (Bragg grating) in the external cavity. BG-ECSLs have excellent performances, such as narrow linewidth, tunability and high SMSR. They are widely used in WDM systems, coherent optical communication, gas detection, Lidar, atomic physics and other fields. 
  • 735
  • 09 Dec 2022
Biography
Erich Kretschmann
Erich Justus Kretschmann (14 July 1887 – 1973) was a Germany physicist.[1] Kretschmann was born in Berlin. He obtained his PhD at Berlin University in 1914 with his dissertation entitled "Eine Theorie der Schwerkraft im Rahmen der ursprünglichen Einsteinschen Relativitätstheorie"[2] (A theory of gravity in the framework of the original Einstein theory of relativity). His advisors were Max
  • 463
  • 08 Dec 2022
Biography
Herman Carr
Herman Y. Carr (November 28, 1924 – April 9, 2008), who published as H. Y. Carr, was an American physicist and pioneer of magnetic resonance imaging. Dr. Carr was born in Alliance, Ohio where he was an Alliance High School graduate in January 1943; he later was inducted into their Hall of Fame. He served in the Army as a Sergeant in the 12th Weather Squadron Air Corps during World War II in It
  • 428
  • 08 Dec 2022
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