Power balancing a multibeam laser [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.38 Electronics, communications engineering
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. National Nuclear Security Administration ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: Article No. 108980A : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 260224
• Chủ đề: 1. 47 other instrumentation; 2. Inertial confinement fusion laser; 3. Master oscillator power amplifier; 4. Omega 60; 5. Power balance

Tóm tắt

Multibeam lasers often require an output beam balance that specifies the degree of simultaneity of the laser output energy, instantaneous power, or instantaneous irradiance (power per unit area). Here, this work describes the general problem of balancing a multibeam laser. Specific techniques used to balance the output power of the 60-beam pulsed OMEGA Laser System are discussed along with a measured reduction of beam-to-beam imbalance. In particular, the square-pulse distortion induced by a simple saturating amplifier operating with its output at some fraction of its saturation fluence is derived, and a method to exchange gain between saturated amplifiers in a single beam that have different saturation fluences to adjust balance is described.