Optical Wave Guidance TRIZ Cases

Quantum well intermixing shifts each laser stripe’s gain profile on one epitaxial wafer, enabling broad wavelength output with lower chip complexity.

A tapered III-V gain region on an SOI waveguide improves light transition, cuts optical loss, and raises coupling efficiency.

High-reflectivity mirrors and evanescent waveguide coupling suppress parasitic feedback, stabilizing on-chip semiconductor lasers for chemical sensing.

A dual-metal Au/Ti electrode lets the insulating film reach a stable end-surface region, suppressing peeling and protecting light output.

A dielectric laterally coupled grating enables precise DFB coupling control, reducing etch defects while supporting repeatable multi-wavelength laser fabrication.

A single lithography mask aligns the DFB grating and reflective facet to lock return phase, improving single-mode stability, yield, and cost.

A higher order mode suppression layer beside the lateral waveguide adds differential loss, preserving brightness and output power in broad area laser diodes.

Wavelength-selective optical feedback stabilizes stacked edge-emitting laser output against temperature drift and improves signal-to-noise ratio.

An angled active region with α-DFB grating cuts thermal resistance and mode reflection, helping QCLs scale average power without beam loss.

Pre-distorting the VCSEL mesa compensates for anisotropic oxidation, producing a target-shaped oxide aperture and circular beam output.

Distributor structures vary epitaxial growth to form adjacent emitter regions with different wavelengths in one simpler semiconductor process.

Broadening laser emission with tunable absorbers or multi-wavelength emitters cuts fringe artifacts and improves color uniformity in MEMS displays.

Polynomial spacing between rib through-holes creates equidistant resonance modes for low-energy phase-synchronized multimode pulses.

Integrated micro-lens or GRIN optics focus infrared light into an SHG crystal, boosting compact visible-light output for displays and sensors.

Semipolar GaN substrates on specific crystal planes improve blue-green laser efficiency, spectral width, and thermal stability for display use.

An asymmetric tapered III-V/silicon directional coupler improves waveguide coupling while easing sub-400 nm tip fabrication and loss control.

A widened ridge and sidewall insulating layer confine 95% of laser intensity, cutting leakage that causes far-field interference fringes.

Polynomial trench variation in the resonant cavity enables equidistant modes and phase-synchronized multimode pulses on silicon.

Semipolar and nonpolar GaN laser bars combine multiple emitters to deliver high blue-green power with less thermal degradation and lower cost.

Segmented recesses beside a ridge guide breaking, cut leakage currents, and improve laser emission face quality.

Etched facet mirrors and reflectivity coatings raise catastrophic optical mirror damage thresholds in high-power gallium nitride laser diodes.

Multiple waveguide sections and independent current control suppress frequency noise and mode hopping in narrow-linewidth semiconductor lasers.

A grating and active-region layout lowers threshold for the fundamental mode while suppressing higher-order modes for higher-power single-mode output.

Deep trench isolation and separate contacts let closely spaced edge emitters be independently modulated while reducing reliance on external optics.