Optical Wave Guidance TRIZ Cases

Inclined amplifier mesa surfaces cut end-surface reflection and improve light coupling, enabling higher optical output.

A ductile protection film above side projections absorbs shocks, shielding the brittle mesa stripe while limiting parasitic capacitance.

Segmenting the waveguide layer between optical amplifiers limits heat transfer, improving tunable laser stability and LiDAR reliability.

Separate high-gamma input and low-gamma output sections raise SOA gain and saturation power while lowering noise and input power demand.

Disconnecting the waveguide layer between optical amplifiers limits heat transfer and improves tunable LiDAR laser stability.

Dielectric DBRs and substrate bonding let this VCSEL emit toward the package side, easing flip-chip coupling and Si photonic integration.

A higher-bandgap field-control layer cuts cladding absorption and thermal saturation, enabling high-power single-mode laser output with lower power use.

Breaking forms laser facets without etching damage, enabling high optical power, low threshold current, and better long-term stability.

Wafer-level wet and dry etching near substrate recesses forms smooth, perpendicular laser facets while avoiding slow breaking and uneven In-rich etching.

Directional etching after mesa bonding removes the second substrate cleanly, suppressing residues that hinder resist coating and device performance.

Using one grating mask to set Bragg grating spacing and phase gives DFB lasers tighter wavelength control and higher single-mode yield.

Laser excitation and phosphor conversion create directional white light that overcomes bulb heat loss and LED brightness limits.

A boundary groove blocks lateral carrier diffusion in a laser light-emitting chip, raising current density, luminous effect, and output power.

Etched GaN beam deflectors turn edge-emitted light by 90° to enable 2D laser arrays with higher optical power and better heat dissipation.

Stress-relief grooves beside the ridge slow cleavage crack transmission, reducing end-surface faults while preserving semiconductor laser characteristics.

A monolithic laser and modulator on a semi-insulating substrate enables CMOS direct drive, cutting amplifier noise, power use, and integration cost.

Precise etching of the grating and output facet in a DFB laser reduces phase uncertainty, improving SMSR and fabrication yield.

Hole-patterned photonic crystal regions are separated from electrode contacts to enable stable electrical driving without degrading laser oscillation.

A current blocking photonic crystal region suppresses leakage outside the emission area, lowering threshold current and raising optical power.

A ring-shaped pump section uses whispering gallery modes, piezo tuning, and a Bragg resonator to match excitation wavelength and improve photon emission.

A volume Bragg grating and thermoelectric-cooled unibody mount narrow diode laser linewidth and limit retroreflection damage.

Barrier metal and insulating film shield the laser pad during junction-down mounting, limiting solder diffusion and heat-related degradation.

A continuous layer structure with conductive center and insulating edges improves laser mode quality by limiting structural-edge birefringence.