Transmission Grating Diffractive Element Design

The patent applies preliminary action by pre-calculating and optimizing the arrangement of diffractive elements before fabrication. The computer-generated hologram method allows the optimal diffractive element configuration to be determined in advance through computational design, ensuring maximum routing efficiency and minimal optical loss when the actual device is operated. This pre-optimization step resolves the contradiction by preparing the system in its most efficient state before use.

The patent employs parameter changes by systematically varying the positions, phases, and amplitudes of diffractive elements through computational optimization. By adjusting these parameters in the computer-generated hologram design process, the system achieves optimal light routing with minimal loss. The ability to precisely control diffractive element parameters computationally allows simultaneous improvement of both optical loss and routing efficiency.

The patent applies mechanics substitution by replacing manual, trial-and-error design methods with computer-based holographic computation. Instead of physically experimenting with different diffractive element arrangements, the system uses computational algorithms to generate optimized configurations. This substitution of computational methods for mechanical/design iteration processes achieves high routing efficiency while keeping the actual device structure relatively simple and manufacturable.

The patent employs universality by creating a single computer-generated hologram that can simultaneously perform multiple routing functions. The diffractive element arrangement designed through this method can route multiple wavelengths or multiple input beams to their respective output ports concurrently, achieving high routing efficiency for complex optical networks without proportionally increasing device complexity. One optimized structure serves multiple functions.

The patent applies mechanics substitution by replacing traditional manual optical design methods with computer-based holographic computation. The computer-generated hologram technique uses numerical algorithms to calculate optimal diffractive element arrangements for efficient optical coupling and mapping. This computational approach dramatically improves coupling efficiency between input and output ports while the resulting designs remain practical for fabrication, thus not excessively increasing overall system complexity.

The patent employs copying by creating a computational model (computer-generated hologram) that replicates and optimizes the optical behavior before physical fabrication. The virtual design process allows testing and optimization of diffractive element arrangements in silico, ensuring optimal coupling efficiency is achieved in the physical device. This copying and pre-validation approach improves coupling efficiency without requiring multiple physical prototypes.