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Lasers & Sources

Slow light laser

Orbits Lightwave, Inc., an innovative supplier of ultra-stable, low-noise fiber lasers announces the introduction of an industry first Slow Light Laser. The slow light technology further advance the state of the art performance of the Orbits' EthernalTM laser platform, that has already emerged as an industry leading ultra-low noise, narrow linewidth, rock stable and reliable laser solution.

The Slow Light Laser development effort was conducted under DARPA's PHOR-FRONT program, that demanded the ultimate in laser noise performance. Orbits' Slow Light Laser is based on the EthernalTM "Virtual Ring Laser Oscillator", a novel architecture that allows traveling wave operation in a compact all-fiber laser cavity. The Virtual Ring Laser topology enables slowing the intra-cavity light. The slower light has so far extended the laser cavity lifetime by a factor of 30 and quenched the laser AM and FM noise to unprecedented levels.

"This is because the slower light group velocity increased the cavity lifetime and therefore effectively extended the laser optical length. This results in orders of magnitude better noise dynamics, since many laser noise parameters scale as the square of the cavity length", said Dr. Yaakov Shevy, Orbits Co-founder and CEO. This was evidenced by a smaller free spectral range, as well as by quenching the laser linewidth below the Schwalow- Townes limit. Another important effect of the slow light is reduction of the low frequency Relative Intensity Noise (RIN), by close to 6 orders of magnitude , down to the shot noise level.