Memorial Tributes Volume 12 (2008) / Chapter Skim
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Ralph A. Logan
Ralph A. Logan
Pages 184-189
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From page 185... ...
Upon graduation from Catholic High School in Montreal in 1943, Ralph won Sir Edward Beatty and Robert Bruce scholarships to McGill University, where he took honors courses in pure and applied mathematics. While at McGill, he won two additional scholarships, the Sir William MacDonald Scholarship 185
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From page 186... ...
With his co-workers, Ralph demonstrated some of the earliest real optically integrated circuits that incorporated gallium arsenide (e.g., aluminum-gallium-arsenide wave guides, lasers, modulators, and switches)
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From page 187... ...
Subsequently, Ralph demonstrated monolithically integrated mode-locked lasers operating at 350 GHz and ultra-low-threshold lasers operating at less than 1 mA at the communications fiber wavelength of 1.55 microns. He continued working on the growth of a variety of semiconductor structures, principally for extending the usefulness of semiconductor lasers, until his retirement in 1994.
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From page 188... ...
His lunch companions might include Chuck Henry, Franz Reinhart, Jan van der Zeil, Dave Lang, Wan Tsang, Barry Levine, John Bean, Anders Olsen, Henryk Temkin, Venky Naryanamurti, Bob Miller, and me. In the field of semiconductor lasers, with apparent ease, he covered the areas of epitaxial growth, device fabrication, and evaluation.
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