When ready, the same technology could also power a range of underwater projectiles, missiles, and torpedoes.
Harbin University researchers have found a way to improve the efficiency of laser propellers using a coating of optical fibers.A new laser-based propulsion technique developed by researchers at the Harbin Engineering University in China could help the People’s Liberation Army build silent yet superfast submarines in the future.
The concept of underwater laser propulsion isn’t new. Japanese researchers first considered it more than twenty years ago. In principle, the technology works fairly simply.Lasers are used to generate plasma inside water, which is then used to make a detonation wave by plasma expansion. The detonation wave is used to propel a craft or weapon ahead.
Using this approach, the researchers claim to be able to generate 70,000 newtons of thrust using just two megawatts of laser power. The thrust generated is similar to that of a commercial jet engine. The researchers used a device that resembled a gun barrel and adjusted its shape and internal structure to minimize the energy loss associated with the use of constraining devices.
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