The parts were marked using a 20 Watt Pulsed Fiber Laser using a 420 mm lens. All three samples were annealed with the speed of 3" per second using frequency of 80 KHZ. Both 1 1/2" OD and 2 1/4" OD were annealed with the power of 17 watts while 1/2" OD was annealed with 18 watts of power.

Technology: Q-switched Fiber Laser
Focal Length Lens: 420mm