There's a Youtube channel looking for a low cost laser backstop material. They have 10-100?kW class single mode fiber lasers that can burn holes in almost anyth

There's a Youtube channel looking for a low cost laser backstop material. They have 10-100?kW class single mode fiber lasers that can burn holes in almost anything Real Genius style. https://youtu.be/n3ssikDQva0 https://youtu.be/n3ssikDQva0