High Efficiency Chromatically Compensated Computer Generated Holographic Optics for Coupling of 1.3 Micron Laser Diodes to Single Mode Fiber

An F/1 collimating element for a laser diode was designed with the recently developed Radially Symmetric Iterative Discrete On-axis (RSIDO) encoding method. The RSIDO method is similar to the previously reported[ 1,2] ID0 method. However, the RSIDO method can be used to achieve higher diffraction efficiencies for design of Holographic Optical Elements (HOE's)[3]. During the design process fabrication constraints such as minimum feature size limitations are employed. Iterative optimization techniques such as simulated annealingare employed to find the near-optimum CGH transmittance within the limitations of the fabrication consuaints.