From park bench revelation to pillar of the laser community: Recalling the legacy of Charles Hard Townes

Charles Hard Townes addresses a luncheon audience after receiving his LIA Lifetime Achievement Award at ICALEO 2010 in Anaheim, Calif.

Charles Hard Townes addresses a luncheon audience after receiving his LIA Lifetime Achievement Award at ICALEO 2010 in Anaheim, Calif.

When Charles Hard Townes stepped up to the podium at ICALEO® in September 2010, he was a 95-year-old legend speaking to hundreds of disciples whose life’s work stemmed from his creations.

It was his own life’s work that brought him to Anaheim that year to accept LIA’s first Lifetime Achievement Award.

“It was an amazing address,” recalls Tom Kugler, fiber systems manager for Laser Mechanisms. “Here was a tall but rather frail-looking man who moved rather slowly up to the podium and then turns to the audience and brings forth a booming voice — strong and sure. He had great stories; the one I remember most was that (Niels) Bohr thought that his ideas regarding the physics of the maser were wrong. Niels Bohr, father of the atom! What Townes wanted us to know is that you have to persevere, no matter who the detractors are, if you know that the science is right.”

Townes, professor emeritus of physics at the University of California, Berkeley (read their appreciation here), persevered to the point where he still made daily visits to the campus up until about a year before his death Tuesday in Oakland. The man who created the maser and conceived the laser discussed his thoughts on receiving his LIA honor in a May 2010 email from his Berkeley account.

“I am very privileged to receive the lifetime achievement award,” he said. “And I feel my life has been very privileged by the opportunity to do research, discover new things, and particularly by the discovery of how a laser could be made. I am also delighted by the many contributions that colleagues have made in development of the laser and further associated discoveries. These have made the field of optics blossom with so many fascinating contributions to science and to technology. Many thanks for this honor, and more importantly many thanks for the many contributions other scientists and engineers have made towards the exciting growth of optics.”

As his New York Times obituary notes, Townes and his brother-in-law, Arthur L. Schawlow, secured a patent for their “optical maser” through Bell Laboratories in 1959 — a year before Theodore Maiman built the first operational laser.

In a video celebrating the Nobel Prize-winning inventor around the time of his 99th birthday (he shared the 1964 prize in physics with Russians Nicolay Basov and Aleksandr Prokhorov), Townes joked that his time on campus “isn’t work; this is just fun. I’ve been practically never working all my life. I always have fun doing physics.”

He often told the tale of the revelation — occurring as he sat on a park bench in Washington, D.C. — that led to his ground-breaking invention. In an interview during the celebration of the 50th anniversary of the laser, he recalled wondering why he hadn’t been able to come up with an idea for how to produce short waves while doing spectroscopy in the microwave region with electronic oscillators. Before the last meeting of a national committee he was heading up to study the problem, “I pulled out an envelope from my pocket and wrote down the equation” that proved to be the answer. Instead of unveiling what he called “kind of a funny idea” at the meeting, he waited until he got home and fleshed out the roadmap for what became the maser (microwave amplification by stimulated emission of radiation).

For his efforts, LIA “decided to present the special award to professor Townes to recognize his contribution to the development of the first laser 50 years ago and in recognition of his lifetime body of work,” said LIA Executive Director Peter Baker. It was “a huge privilege” to listen to Townes’ presentation, which he remembered included the pioneer’s story of how two Nobel-winning professors senior to him tried to dissuade him from continuing his early research.

While we mourn the passing of this giant and his legacy, we fondly recall his passion and vigor and thank him for the work that continues to guide our mission.

Did you study with or meet Dr. Townes or listen to a presentation of his? Feel free to share your thoughts in the comments below or email them to Geoff Giordano at ggiordano@lia.org.

LIA’s Laser Safety Guide Revised for 2015

ORLANDO, FL, Jan 19, 2015 — For the first time since 2007, the Laser Institute of America has updated its acclaimed Laser Safety Guide making it a necessity for every safe laser environment. Easy to comprehend and full of practical information, the Laser Safety Guide is a quick read that can benefit anyone who uses lasers in their workplace. The Laser Safety Guide has been revised to comply with the new terminology and guidelines of the 2014 edition of the ANSI Z136.1 Safe Use of Lasers standard. It can be used in conjunction with or as a supplement to any of the ANSI Z136 standards.

“The new Laser Safety Guide is an update of the document that reflects the dramatic changes in the ANSI Z136.1-2014 standard.  The guide is a fundamental tool for any laser safety expert who desires to develop and advance a laser safety program or execute laser safety for a single laser,” says Ben Rockwell, prior chair of the ANSI Z136.1 rewrite committee and editor of the revision for the Laser Safety Guide. Rockwell recommends everyone who uses lasers have this guide. “It is geared toward the beginner in laser safety, but would benefit even the most seasoned expert.  The guide progresses through fundamental concepts of laser safety, with examples where they provide an understanding of the application of the standard.”

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ICALEO 2014 Offered Attendees a Full Spectrum of Laser Possibilities

By Geoff Giordano 

Not resting on the laurels of its flagship conference, the Laser Institute of America instituted a peer-review process for its 33rd International Congress on Applications of Lasers & Electro-Optics (ICALEO®), held Oct. 19-23 in San Diego.

For the first time, ICALEO featured presentations given even more rigorous analysis than previous events; 56 of the 61 papers submitted for peer review were accepted. “It was quite a bit of a challenge” reviewing abstracts, said returning Congress General Chair Stefan Kaierle of Laser Zentrum Hannover. “We believe it was necessary… to change the way we present our work and especially to improve the quality.” At least two people reviewed each paper in the double-blind process. About 35 to 40 papers will be published in a special edition of the Journal of Laser Applications® (JLA), he said.

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LAM 2015 Delivers Revolutionary Applications in Additive Manufacturing

BY GEOFF GIORDANO

With more new workshops than ever purporting to give a true perspective on 3D printing and additive manufacturing, the Laser Institute of America’s Laser Additive Manufacturing (LAM®) Workshop has been ahead of the curve when it comes to realistic assessments of revolutionary industrial applications.

In its seventh year, LAM 2015 will again provide an intensive two-day immersion in the full spectrum of laser-based industrial additive applications — from traditional corrosion and wear protection and repair to the more hype-worthy powder-bed and powder-fed methods.

For the first time, LAM will not be held in the power-generation hub of Houston but in LIA’s hometown of Orlando, on Mar. 4-5 at the Embassy Suites Orlando – Lake Buena Vista South (Orlando, FL). LIA is a key part of the Florida High-Tech Corridor and the state’s photonics community, which includes the nearby College of Optics and Photonics at the University of Central Florida.

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