The first working laser was powered by a photographic flashbulb
In 1960, physicist Theodore Maiman successfully built the world's first working optical laser at Hughes Research Laboratories. While competitors chased complex, expensive setups, Maiman wrapped a spiraling xenon flashlamp around a small cylinder of synthetic pink ruby. When the flash tube fired high-intensity light pulses, the ruby's chromium atoms amplified the photons into a coherent red beam. Leading scientific journals had previously doubted practical lasers were possible, initially rejecting Maiman's discovery.
The Race Beyond the Microwave Maser
In the late 1950s, the frontier of experimental physics centered on extending stimulated emission into the visible spectrum. Scientists had already developed the maser—short for microwave amplification by stimulated emission of radiation—demonstrated by Charles Townes and independently analyzed by Soviet physicists Nikolay Basov and Aleksandr Prokhorov. The maser operated successfully at long microwave frequencies, but shifting that operation into the much shorter wavelengths of infrared and visible light presented severe physical and engineering obstacles.
In 1958, Arthur Schawlow and Charles Townes published a landmark theoretical paper proposing an optical maser. Their work established that an optical cavity could amplify light if researchers could achieve population inversion, a condition where more atoms exist in an excited energy state than in a lower ground state. Around the world, elite corporate and academic laboratories entered a fierce competition to build the first physical device. Major institutions, including Bell Labs, Columbia University, and RCA, committed substantial budgets and teams to investigate gas systems and alkali metal vapors, believing those materials offered the only viable path to optical amplification.
Challenging the Consensus on Synthetic Ruby
Theodore Maiman, a physicist working at Hughes Research Laboratories in California, took a completely divergent approach. Maiman held a doctorate in physics from Stanford University, where he had studied under Nobel laureate Willis Lamb, and had acquired deep experimental experience improving solid-state ruby masers for Hughes Aircraft Company. Through this work, Maiman had developed an intimate practical understanding of synthetic ruby—an aluminum oxide crystal known as corundum that contains small amounts of chromium impurities.
The wider scientific establishment, however, had explicitly written off ruby as a laser medium. Schawlow had publicly argued that ruby was unsuitable because depopulating its ground state would demand impractical amounts of energy, and prevailing literature suggested its fluorescent quantum efficiency was too low to sustain amplification. Most laboratories accepted these calculations and abandoned solid-state crystals. Maiman refused to rely on secondary assertions. He painstakingly measured the optical properties and quantum efficiency of synthetic pink ruby himself, discovering that earlier calculations were flawed. The chromium-doped crystal possessed a quantum efficiency high enough to make a practical optical device feasible.
The Photographic Flashlamp Mechanism
While rival groups designed complicated, continuous-wave systems powered by powerful laboratory arc lamps, Maiman recognized that continuous pumping was not immediately necessary to prove the physical concept. A pulsed system could deliver sufficient peak optical power to achieve population inversion without melting the crystal or requiring exotic cooling systems. To supply the intense burst of light, Maiman turned to an off-the-shelf component: a helical xenon flashlamp of the type manufactured by General Electric for high-speed photography.
Maiman assembled his laser with remarkable mechanical simplicity. At the heart of the setup was a cylindrical synthetic ruby crystal rod, ground flat at both ends and polished to optical precision. One flat end was coated with a fully reflective layer of silver, while the opposite end received a partially reflective silver coating to serve as an output coupler. Maiman wrapped the spiraling quartz tube of the xenon flashlamp directly around the ruby cylinder. The entire assembly was compact enough to be held in the palm of a hand, encased inside a small aluminum cylinder that reflected stray flash energy back toward the ruby.
Achieving Population Inversion
The device functioned as a three-level laser system. When an electrical discharge triggered the xenon flashlamp, the lamp emitted an intense pulse of broad-spectrum light. Chromium ions within the ruby crystal absorbed blue and green wavelengths from the flash, exciting their electrons out of the ground state and into high energy bands. From these bands, the electrons rapidly dropped through non-radiative transitions into a long-lived, metastable energy state.
Because the flash pumped energy into the system faster than the atoms could spontaneously relax back down, the population of the metastable state surged, temporarily outnumbering the atoms remaining in the ground state. Once population inversion occurred, the first spontaneously emitted photons traveling along the longitudinal axis of the rod stimulated other excited chromium ions to release identical photons. The mirrored ends reflected these photons back and forth through the crystal, creating an escalating cascade of stimulated emission until a brilliant, coherent pulse of deep red light at a wavelength of 694.3 nanometers burst through the partially silvered mirror.
May 16, 1960 and the Skeptical Reception
Maiman operated the device successfully for the first time on May 16, 1960, at Hughes Research Laboratories. The output produced a dramatic reduction in the decay time of the ruby fluorescence and a profound narrowing of the spectral line, conclusively proving that optical amplification and coherent stimulated emission had occurred. Maiman had single-handedly built the world's first functioning laser, beating well-funded teams of researchers who possessed vastly greater institutional backing.
Despite the historical breakthrough, the scientific establishment reacted with skepticism. Maiman submitted a concise manuscript describing his working optical maser to Physical Review Letters. The editor, Samuel Goudsmit, rejected the paper without sending it for peer review. Goudsmit had grown frustrated by a flood of repetitive submissions concerning microwave masers and mistakenly believed Maiman's paper was merely another incremental maser report. Unfazed by the rejection, Maiman submitted a revised short report titled 'Stimulated Optical Radiation in Ruby' to the British journal Nature, which published it on August 6, 1960.
The Legacy of the First Working Laser
Shortly before the Nature article appeared, Hughes Aircraft Company announced Maiman's achievement to the public at a press conference in New York City on July 7, 1960. The announcement generated global interest, although early commentators famously struggled to comprehend its utility, occasionally characterizing the laser as a solution looking for a problem. Within months, however, researchers worldwide replicated Maiman's setup and rapidly introduced alternative solid-state, gas, and semiconductor systems.
Maiman eventually left Hughes to establish his own commercial laser venture, Korad Corporation, in 1962, directing the design of high-power ruby systems and subsequent industrial technologies. Although Townes, Basov, and Prokhorov received the 1964 Nobel Prize in Physics for their foundational theoretical and experimental work in quantum electronics, Maiman received wide recognition, including the Wolf Prize in Physics and the Japan Prize. His elegant synthesis of a synthetic crystal rod and a photographer's strobe transformed optical physics from theoretical conjecture into an indispensable pillar of modern technology.
Key takeaways
•Theodore Maiman built the first working laser at Hughes Research Laboratories on May 16, 1960, utilizing a synthetic ruby rod and a photographic xenon flashlamp.
•Maiman proved that solid-state ruby was viable after personally remeasuring its quantum efficiency, overturning an erroneous consensus held by leading physicists.
•The initial scientific manuscript detailing the invention was rejected by Physical Review Letters before finding publication in Nature in August 1960.