Active or passive controlling synthesizer of laser coherent

Abstract

Using mechanism of inner wastage in laser cavity implements self-adjustment of phase, and combining active control implements phase lock obtained even under outputting high power. Meanwhile, synthesized laser output in single beam is obtained directly. The disclosed equipment includes at least two resonant cavities to constitute Vernier-Michelson resonant cavity, or Mach-Zehnder resonant cavity, or Fox-Smith resonant cavity. Detector detects outputted light intensity split by beam splitter. Using feedback to control phase variation realizes coherent synthesis of laser. Advantages are: high efficiency, compact structure, single beam of laser output in large power, and stable system performance.

Description

technical field [0001] The invention relates to a laser coherent combining device, in particular to a device for realizing laser coherent combining through active control and passive control. Background technique [0002] High-power and ultra-high-power high-brightness lasers play an extremely important role in applications such as industry and scientific research. However, for a single laser, it is very difficult to obtain ultra-high output power and high brightness at the same time, because it is limited by internal physical factors and structural factors (such as thermal effects, nonlinear effects, damage threshold, laser medium characteristics, etc. ), such as bulk solid-state lasers can output very high power, but the beam quality usually deteriorates at high power output; another example is fiber lasers that can achieve high-brightness laser output, but the single-mode power is also limited to the kW level. [0003] Multi-beam coherent combining technology provides an...

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Problems solved by technology

However, this technology can only achieve coherent combination at a certain power. If the pump power is increased, the phase cannot be locked by the self-adjustment process.

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