POET optical-interconnect roadmap

Updated: 2026-04-29 Status: ✓ Current generation 800G/1.6T verified via POET press releases and ECOC 2025 paper; 3.2T positioning is forward-looking with QCi co-development as primary anchor Cross-references: Platform overview · Products · customers · competitors

1. Industry generation framework

The data-center optical-interconnect roadmap follows the IEEE 802.3 and OIF (Optical Internetworking Forum) standards cadence. The relevant generations:

Generation	Per-lane rate	Total port rate	Form factors	Standard	Volume window
100G	25 G NRZ × 4	100 G	QSFP28	IEEE 802.3bm/cd	2017–present (mature)
400G	50 G PAM4 × 8, 100 G PAM4 × 4	400 G	QSFP-DD, OSFP	IEEE 802.3bs/cu	2020–present
800G	100 G PAM4 × 8, 200 G PAM4 × 4	800 G	QSFP-DD, OSFP, OSFP-XD	IEEE 802.3df / OIF 800G ZR	2023–present (volume ramp)
1.6T	200 G PAM4 × 8	1.6 T	OSFP-XD, OSFP 1.6T	IEEE 802.3dj	2025–2027 (early ramp)
3.2T	400 G PAM4 × 8 (TFLN, EO-polymer, advanced Si MZM)	3.2 T	CPO, NPO, OSFP-XD-2	IEEE P802.3 next-gen task force	2027–2030 (early sampling)

OIF and IEEE 802.3 are the primary standards bodies; CPO Collaboration (Microsoft + Meta sponsor) and CW-WDM MSA (multi-source agreement for external light sources) are the secondary forums. ✓ (IEEE 802.3 working groups — public)

POET as a small-cap is not directly a voting standards-body member, but its products map to the form-factor and rate definitions issued by these bodies. ⚠ Standards-membership status not separately verified for individual POET technical staff.

2. POET product roadmap by generation

2.1 400G generation — POET Infinity (chiplet-based building block)

POET Infinity is the chiplet-architected 400 G/lane-pair transmitter platform announced 2023-03-02, designed as a scalable building block that daisy-chains to deliver 800G, 1.6T, and beyond from a single Interposer mask family. ✓ (POET Infinity announcement, 2023-03-02)

Features per POET disclosure:

Integrated EML lasers, drivers, and MUX on the Interposer (transmitter)
High-speed photodiodes, TIA, and DMUX (receiver)
Extremely small form factor; elimination of wire bonds; passive assembly of components
Monolithically integrated MUX/DMUX (the AWG MUX is fabricated in the Si waveguide layer, eliminating a discrete component)
Drastic reduction in BOM versus conventional discrete TOSA/ROSA designs

The 400G generation by 2025 is mature and POET is not trying to win it as a primary revenue stream — the higher-margin opportunity is 800G/1.6T. POET Infinity is positioned as the scalable architecture that lets the same engine family follow the rate curve. ✓

2.2 800G generation — primary 2025–2026 revenue ramp

POET announced 800G + 1.6T Optical Engines for hyperscale data center 2022-10-27. ✓ (Announcement)

Disclosed 800G product variants:

800G CWDM4 / FR4 — four-lane 200 G PAM4 over CWDM wavelengths, 2 km reach
800G DR8 — eight-lane 100 G PAM4 single-mode parallel, 500 m reach
800G PSM8 — eight-lane parallel single-mode

2025 milestones:

2025-Q2: Sample backlog of 800G optical engines shipped from Globetronics in Malaysia ✓ (Globetronics agreement update)
2025-Q3: Two unnamed key customers placed initial production orders totaling >$5.6M ✓ (Q3 2025 earnings release)
2025-10-22: Separate $5.0M production order for 800G optical engines disclosed ✓ (Press release)
2024-09-12: Mentech selected POET’s transmit and receive engines for 800G modules ✓
2025: Lessengers (Korea) committed to a module development using POET’s 800G optical engines ✓ (Q2 2025 update)

800G outlook through 2026: POET targets continued ramp on existing customer engagements. The April 2026 Marvell-Celestial AI cancellation removed the highest-profile 800G design win on the production side. ⚠ Replacement orders from non-Marvell customers are the primary near-term thesis driver.

2.3 1.6T generation — current technical hero

The Hybrid-Integrated 1.6T 2xFR4 Transmitter PIC is POET’s current technical hero unit, presented in a technical paper at ECOC 2025 in Copenhagen titled “Hybrid Integrated 1.6T 2xFR4 Transmitter PIC using a CMOS-based Optical Interposer” (Raju Kankipati, CRO, presenter). ✓ (ECOC 2025 schedule)

1.6T product family disclosed:

1.6T 2xFR4 transmitter — four 2×200G EML arrays + eight high-speed driver ICs + two AWG MUX, single Interposer (blog post)
1.6T 2xFR4 receiver — Semtech FiberEdge 200G/lane TIA integrated onto the Interposer (2025-10-06 launch)
1.6T DR8 receiver — eight-lane 200G/lane PAM4 single-mode parallel, evaluation units immediately available

POET Teralight — separately branded as the “Cost- and Performance-optimized Optical Engines for 1.6T Networks” product family, discussed at ECOC 2025 Product Focus session. ✓ (ECOC 2025 program)

1.6T design wins disclosed:

2025-09-12 Mentech selected POET engines for 1.6T modules ✓
2026 (sampling target Q2): POET + Lessengers joint development of a 1.6T 2×DR4 module, combining POET Optical Interposer with Lessengers’ Direct Optical Wiring ✓ (POET-Lessengers expansion)

1.6T design-win asymmetry: the cancelled Marvell-Celestial AI engagement was substantially focused on 1.6T-class CPO product. The remaining 1.6T pipeline is led by Mentech, Lessengers, the Semtech receiver collaboration (which is platform-not-customer), and undisclosed engagements at Foxconn Interconnect Technology and Luxshare per CFO Mika’s April 2026 commentary. ◐ (Stocktwits POET CFO interview)

2.4 3.2T generation — forward roadmap, anchored by QCi TFLN partnership

3.2 Tbps optical engine is the explicit forward roadmap target, announced 2025-11-11 as a co-development with Quantum Computing Inc (QCi) integrating QCi’s TFLN 400 G/lane modulators onto the POET Optical Interposer. ✓ (POET-QCi collaboration release)

Per POET-QCi disclosure:

POET will fund QCi’s development of the 400 G/lane TFLN modulator
Targeted completion: H2 2026
Target form factors: pluggable + CPO
Market opportunity: ~$12B by 2030 per LightCounting “Ethernet Optics: Cloud, Enterprise and Telecom” (Sept 2025)

3.2T parallel opportunity — Sivers ELS: the September 2025 POET-Sivers Semiconductors collaboration on External Light Source (ELS) modules for CPO is the second 3.2T-class plank. ELS is the externally-modulated-laser supply for CPO substrates: as switch ASICs adopt CPO, the laser must move out of the transceiver and into a separate ELS module. POET + Sivers DFB lasers integrated on the Interposer is the productized response. ✓ (POET-Sivers collaboration)

Demonstrations targeted H1 2026, prototype delivery and production readiness end-2026. ELS market opportunity disclosed as $1B+ annually.

2.5 6.4T+ — explicit future tense

POET has used the language “as AI datacenter connectivity scales from 800 Gbps toward 6.4 Tbps and beyond” in the Sivers collaboration release. ✓ This is a forward-statement positioning the architecture for the post-3.2T generation. No specific product disclosed at the 6.4T port-rate level as of 2026-04-29.

3. Form-factor positioning

Form factor	Rate range	Status	POET engagement
QSFP-DD	400G–800G	Mature	Engine-level engagement ✓
OSFP	800G–1.6T	Volume	Primary form factor for current 1.6T product ✓
OSFP-XD (XD = extended density)	1.6T+	Early production	Targeted ✓
OSFP-XD-2 / next-gen	3.2T	Pre-standard	Targeted via QCi 3.2T engine ✓
CPO substrate (switch ASIC adjacent)	800G–3.2T+	Pre-volume	Explicit positioning via QCi + Sivers ELS ✓
NPO (near-package optics)	800G–1.6T	Pre-volume	Architecturally compatible ⚠ no specific product disclosed
AOC / AEC	100G–800G	Volume	Not addressable (POET supplies engines, not full cables) — out of scope

CPO and NPO matter most strategically: as switch-ASIC vendors (Broadcom, Marvell, NVIDIA Spectrum-X, Cisco Silicon One) move ports from front-panel pluggable cages to package-edge optical engines, the addressable market for engine-level suppliers like POET shifts from ~$50–$200/engine in pluggables to potentially higher-margin substrates with multi-engine packaging. The QCi and Sivers partnerships are POET’s anchors for that transition. ⚠ Margin framing inferred; precise per-engine ASP at CPO not disclosed.

4. Standards and consortia engagement

4.1 IEEE 802.3

The IEEE 802.3 task forces relevant for POET’s roadmap:

IEEE 802.3df — 800 Gb/s Ethernet (200G/lane) — completed
IEEE 802.3dj — 200G/lane × 8 = 1.6T Ethernet — published 2025
IEEE P802.3 — next-gen 400G/lane → 3.2T Ethernet task force

POET as a small-cap is not a leadership / voting member but participates indirectly via partner companies (Mitsubishi Electric, Semtech, Sivers — all IEEE participants). ⚠ Specific committee participation by POET technical staff not separately verified.

4.2 OIF

OIF defines the implementation agreements that bridge the IEEE rate spec to the optical-module form factor and electrical interface:

OIF CEI — common electrical interface (CEI-112G, CEI-224G)
OIF 800G ZR / 1.6T ZR / coherent
OIF CPO Implementation Agreement

POET products implement OIF-defined optical specifications via partner DSPs. ✓

4.3 CW-WDM MSA

The CW-WDM (continuous-wave wavelength-division multiplexing) Multi-Source Agreement defines the wavelength grid and optical power specs for external-light-source (ELS) modules used in CPO. The Sivers Semiconductors collaboration (Sept 2025) explicitly aligns to CW-WDM MSA framing. ✓ (per release language “Co-Packaged Optics” and ELS market context)

4.4 CPO Collaboration

Microsoft and Meta sponsor a CPO Collaboration consortium that defines integration interfaces between switch ASIC, photonic engine, and ELS. POET is not a publicly disclosed founding member, but the QCi 3.2T and Sivers ELS architectures align with CPO Collaboration substrate concepts. ⚠ Membership not separately verified.

5. Roadmap timeline summary

Year	POET milestone	Form factor / rate	Status
2018	SilTerra 8” Si foundry partnership	Platform	✓
2018	Almae Technologies III-V supply collaboration	Platform	✓
2022-10	800G + 1.6T Optical Engines announced	OSFP / QSFP-DD	✓
2023-03	POET Infinity chiplet platform	400G building block	✓
2023-04	First production-unit purchase order disclosed (later cancelled by Marvell 2026-04-23)	800G/1.6T	✓ then ⚠ cancelled
2024-09	Mentech selects POET engines for 800G+1.6T	OSFP	✓
2024-12	Globetronics manufacturing agreement signed	Platform / capacity	✓
2024-12	Super Photonics Xiamen (SPX) wholly acquired from Sanan	Platform / capacity	✓
2025-06	NationGate Malaysia second manufacturing partner	Platform / capacity	✓
2025-09	Sivers Semiconductors ELS collaboration	CPO ELS	✓
2025-10	Semtech 1.6T receivers launch	OSFP / OSFP-XD	✓
2025-Q3	$5.6M production orders from two key customers	800G	✓
2025-10	$5M 800G production order disclosed	800G	✓
2025-11	Quantum Computing Inc 3.2 Tbps TFLN engine collaboration	3.2T pluggable + CPO	✓
2025 ECOC	”Most Innovative Chip-scale Packaging” award + 1.6T 2xFR4 PIC paper	1.6T	✓
2026-04-23	Marvell-Celestial AI cancels POET purchase orders	Generation-agnostic, materially negative	⚠
2026-H2 (target)	QCi 400G/lane modulator development complete	3.2T	Forward
2026 end (target)	Sivers ELS production readiness	CPO	Forward
2026-Q2 (target)	POET-Lessengers 1.6T 2×DR4 sample delivery	OSFP-XD	Forward

6. Cross-references

Platform overview — architectural detail underpinning every roadmap entry
Products — current SKU list
Foundry relationships — capacity to support the ramp
Papers and conferences — technical-paper provenance for the 1.6T 2xFR4 PIC and forward 3.2T roadmap
customers — order-by-order disclosure
competitors — head-to-head positioning at each rate