Photonic Integrated Circuit Patents

Photonic integrated circuit patents cover silicon photonics foundry process and passive device innovations; electro-optic modulator and germanium photodetector innovations; InP coherent transceiver and laser integration innovations; and co-packaged optics CPO and optical interconnect innovations — with IP held by semiconductor foundries, optical networking companies, and silicon photonics startups: MAJOR PHOTONIC INTEGRATED CIRCUIT PATENT HOLDERS: INTEL / LUXTERA: 2,000+; specific silicon photonics innovations (specific specific CMOS-compatible SiPh: specific specific 300 mm bulk Si wafer from specific specific 220 nm SOI 2 μm BOX from specific specific PN depletion Mach-Zehnder modulator MZM: specific specific p++/n++ junction 3.5×10¹⁷/cm³ from specific specific V_π·L 2.3 V·cm from specific specific 35-40 Gbps 3 dB EO bandwidth from specific specific push-pull dual arm from specific specific drive: specific specific -2V reverse bias from specific specific Ge photodetector: specific specific 50 GHz bandwidth from specific specific responsivity 0.9 A/W 1,310/1,550 nm from specific specific dark current 10 nA from specific specific 400G DR4 module: specific specific 4×100G WDM λ1307 λ1295 λ1271 λ1295 from specific specific CWDM4 100G·m from specific specific on-chip grating coupler: specific specific fiber-to-chip 1 dB IL 0.12 nm bandwidth); TSMC: 1,000+; specific innovations (specific specific N7P SiPh monolithic: specific specific 220 nm thick Si 3 μm SiN from specific specific single-mode ridge waveguide from specific specific ring resonator FSR 1 nm from specific specific Q 10,000 add-drop MRR from specific specific Ge-on-Si photodetector from specific specific co-packaged optics CPO: specific specific 51.2 Tbps/package from specific specific 0.3 pJ/bit vs. 3 pJ/bit pluggable from specific specific silicon electronic-photonic integrated circuit EPIC); CISCO / ACACIA: 1,000+; specific coherent innovations (specific specific InP coherent PIC: specific specific PM-QPSK QPSK 16-QAM 64-QAM from specific specific dual-polarization IQ modulator from specific specific narrow linewidth CW DFB laser <100 kHz from specific specific 400ZR CFP2-DCO from specific specific 0.3 pJ/bit DSP ASIC co-integration from specific specific 400G ZR+ 120 Gbaud); LUMENTUM: 500+; II-VI / COHERENT: 500+.

Silicon waveguide and photonic circuit routing innovations; electro-optic modulator carrier depletion and carrier injection innovations; and germanium photodetector and avalanche photodiode APD innovations represent core photonic integrated circuit patent domains: SILICON WAVEGUIDE PATENTS: INTEL; IMEC; MIT; IBM; LETI: specific waveguide innovations (specific specific SOI waveguide: specific specific Si 220-500 nm height on SiO₂ 2 μm BOX from specific specific single-mode 500 nm×220 nm 1.55 μm from specific specific loss: specific specific ridge 0.5-1.0 dB/cm from specific specific strip 1.0-2.0 dB/cm from specific specific bend radius: specific specific 5 μm for 220 nm Si from specific specific evanescent coupling: specific specific directional coupler 50:50 at 12 μm from specific specific multimode interference MMI 3 dB 2×2 from specific specific SiN waveguide: specific specific 400 nm thick LPCVD from specific specific <0.1 dB/cm loss at 780 nm from specific specific visible+NIR 400-2,000 nm transparent from specific specific anomalous dispersion for Kerr comb from specific specific grating coupler: specific specific 500 nm pitch 70 nm etch depth from specific specific 1 dB IL 10° tilt fiber from specific specific 1-2 dB best-in-class apodized from specific specific edge coupler: specific specific inversely tapered 150-200 nm tip from specific specific <1 dB IL lensed fiber from specific specific adiabatic bend EULER spiral 2.5 μm min radius); MODULATOR PATENTS: INTEL; STMICRO; MELLANOX; SICOYA; AYAR LABS: specific modulator innovations (specific specific PN MZM: specific specific lateral p-n junction depletion mode from specific specific V_π·L 2-4 V·cm vs. 100 V·cm LiNbO₃ legacy from specific specific 40-56 Gbps PAM4 NRZ per lane from specific specific EO bandwidth 3 dB from specific specific carrier injection: specific specific p-i-n forward bias PIN from specific specific 0.1-0.3 V drive faster modulation from specific specific plasma dispersion Δn=-8.8×10⁻²²ΔN-8.5×10⁻¹⁸ΔP from specific specific ring resonator modulator: specific specific 5 μm radius Si ring from specific specific 10 Gbps 1-2 pJ/bit vs. MZM 100 fJ thermal penalty from specific specific LiNbO₃-on-insulator LNOI: specific specific thin film 600 nm X-cut from specific specific Δn_EO 2.5×10⁻⁵ vs. Si carrier from specific specific 100 GHz >2 V_π at <1 V_π·L from specific specific 800 Gbaud per lane projected); GE PHOTODETECTOR PATENTS: INTEL; STMICRO; IBM; MIT: specific PD innovations (specific specific Ge-on-Si PD: specific specific CVD Ge 1 μm 800°C 400°C from specific specific p-i-n vertical or waveguide coupled from specific specific responsivity 0.9 A/W 1,310 nm 0.7 A/W 1,550 nm from specific specific dark current 10-100 nA 1 μm² from specific specific bandwidth 50 GHz at -2 V bias from specific specific APD Ge-Si: specific specific Si multiplication region from specific specific M gain 10× at 8 V from specific specific excess noise factor F=2.7 from specific specific sensitivity -18 dBm at 25 Gbps).

InP indium phosphide coherent laser and modulator monolithic integration innovations; optical frequency comb microresonator and integrated laser innovations; and co-packaged optics CPO and optical I/O chiplet innovations represent additional photonic IC patent domains: INP COHERENT PIC PATENTS: CISCO/ACACIA; LUMENTUM; II-VI/COHERENT; NEC; FUJITSU: specific InP innovations (specific specific InP monolithic coherent PIC: specific specific DFB laser 1,550 nm from specific specific semiconductor optical amplifier SOA from specific specific electro-absorption modulator EAM from specific specific PM-QPSK IQ modulator dual-polarization from specific specific 400G/800G coherent: specific specific 130 Gbaud 64-QAM 800G per wavelength from specific specific polarization multiplexing 2× per λ from specific specific EDFA+Raman amplification from specific specific CFP2-DCO 400ZR: specific specific 100 km SSMF 400G from specific specific DSP 5 nm ASIC 0.3 pJ/bit from specific specific OIF 400ZR standard from specific specific InP VCSEL: specific specific 940 nm 3D sensing Apple Face ID from specific specific 850 nm 100G VCSEL PAM4 from specific specific VCSEL array 12×: specific specific 100-400G multimode OM4); OPTICAL FREQUENCY COMB PATENTS: LIONIX; EPFL; CALTECH; NIST; IMEC: specific comb innovations (specific specific SiN microresonator Kerr comb: specific specific 100 GHz FSR ring 100 μm radius from specific specific anomalous GVD β₂<0 from specific specific soliton DKS dissipative Kerr soliton from specific specific threshold power 50 mW from specific specific 100 comb lines -30 dBm each from specific specific DWDM channel 100 GHz 100-channel grid from specific specific EO comb: specific specific CW+EOM LiNbO₃ thin film from specific specific 30 GHz FSR per modulator stage from specific specific flat-top comb ±1 dB 50 lines); CO-PACKAGED OPTICS PATENTS: TSMC; INTEL; BROADCOM; AYAR LABS; RANOVUS: specific CPO innovations (specific specific CPO architecture: specific specific PIC chiplet flip-chip to switch ASIC from specific specific <1 mm reach vs. 1-10 m pluggable from specific specific 51.2 Tbps bandwidth density from specific specific 0.3 pJ/bit total vs. 3 pJ/bit pluggable from specific specific optical I/O chiplet: specific specific TeraPHY Ayar Labs 2 Tbps from specific specific wavelength-division CWDM 8×25G per fiber from specific specific silicon-photonics die embedded interposer from specific specific UCIe co-packaged optical standard from specific specific thermal management: specific specific microfluidic cooling 200 W/cm² from specific specific TIM thermal interface TIM 0.1 W/m·K).

Silicon photonics startup IP strategy must navigate Intel/Luxtera (2,000+) and TSMC (1,000+) broad SiPh foundry and device IP; understand that standard SOI waveguide processes and passive components have significant prior art but novel device integration and application-specific photonic systems are viable; identify whitespace in thin-film LiNbO₃ modulators at >100 GHz, novel microresonator comb applications, optical computing and AI inference accelerators, and biomedical sensing integrated PICs — while understanding that foundry access (TSMC SiPh, GlobalFoundries Fotonix, IMEC) is the critical infrastructure constraint: SILICON PHOTONICS STARTUP IP STRATEGY: UNDERSTAND THE SILICON PHOTONICS PATENT LANDSCAPE — INTEL/LUXTERA AND TSMC HOLD BROAD FOUNDRY AND DEVICE IP: Intel (2,000+) and TSMC (1,000+) hold broad SiPh process, modulator, and photodetector IP — however much SiPh IP is narrow to specific process nodes and device configurations; novel integration schemes, new applications, and post-foundry processing are less encumbered; THIN-FILM LNOI AND NOVEL MODULATOR MATERIALS ARE THE HIGHEST-VALUE LEAST-CONSOLIDATED IP DOMAIN: LiNbO₃-on-insulator LNOI 600 nm thin film (100 GHz, <1 V_π·L, electro-optic without carrier injection) represents a rapidly growing IP domain with less encumbrance than Si MZM; Acacia/Cisco LNOI IP and Harvard LNOI foundational are active but many device configurations remain open; WHEN TO PATENT IN PHOTONIC INTEGRATED CIRCUITS: NOVEL PIC WITH MEASURED OPTO-ELECTRONIC PERFORMANCE: specific novel photonic IC (specific specific material platform + specific specific device type + specific specific integration scheme) with specific measured performance (specific specific bandwidth GHz at specific specific V_π or drive voltage + specific specific insertion loss dB at specific specific wavelength + specific specific energy per bit pJ/bit at specific specific data rate Gbps + specific specific dark current nA and responsivity A/W for detectors + specific specific waveguide loss dB/cm) vs. specific specific Intel Si MZM V_π·L 2.3 V·cm 40 Gbps or specific specific Cisco LNOI 100 GHz <1 V baseline — measured bandwidth, V_π·L, and energy per bit is the critical photonic IC IP metric; KEY FTO CHECKLIST: Intel 220 nm SOI PN MZM V_π·L 2.3 V·cm 40 Gbps push-pull 400G DR4 grating coupler 1 dB; TSMC N7P SiPh ring Q 10,000 FSR 1 nm Ge PD 50 GHz 0.9 A/W CPO 51.2 Tbps 0.3 pJ/bit; Cisco Acacia InP DFB SOA EAM PM-QPSK 400ZR CFP2-DCO 130 Gbaud 64-QAM 5 nm DSP; LNOI 600 nm X-cut EO Δn 2.5×10⁻⁵ 100 GHz; SiN 400 nm <0.1 dB/cm Kerr soliton DKS 100 GHz FSR 100 lines DWDM; EO comb LiNbO₃ 30 GHz flat-top ±1 dB; CPO TeraPHY 2 Tbps UCIe interposer CWDM 8×25G.