Free-Space Optical Communication Patents: Leaders & White Space 2026
- Filing has plateaued, not grown. activity rose from 7 families in 2017 to a peak of 26 in 2024, but the 2022 midpoint of 13 shows the climb was uneven rather than compounding.
- The US and China dominate filing venues. 96 US and 71 China receiving-office records dwarf Europe's 46, WIPO's 34, Australia's 17 and India's 14, concentrating enforceable rights in two jurisdictions.
- Claims sit almost entirely in one IPC subclass. 298 of 307 records touch H04B transmission, while only 41 reach G02B optics and 15 touch G06N — signal-processing and AI-assisted link claims remain comparatively thin.
What the dataset covers
This landscape draws on 307 patent families published between 2015 and mid-2026 that combine free-space optical communication, laser communication terminals or FSO links with claims touching atmospheric turbulence, pointing-acquisition-tracking, link availability, inter-satellite links or beam divergence, filtered to H04B10, G02B27 and B64G1. That scope captures both terrestrial atmospheric links and satellite-to-satellite optical crosslinks, but excludes fiber-only optical transmission and generic RF satellite communication claims.
Because publication typically lags filing by around 18 months, the 2025 and 2026 counts in the trend chart understate real filing activity; treat the most recent one to two years as a floor, not a ceiling.
Filing trends and technology composition
Two views of the same 307-family dataset: how filing volume has moved year over year, and where those filings sit across the IPC classification system.
A plateau after a slow climb
Filings moved from 7 in 2017 to a peak of 26 in 2024. The 2022 midpoint of 13 sits roughly halfway between those points, which means growth was gradual rather than exponential, and the years since the peak have not extended it further.
Transmission claims dominate; optics and AI are secondary
H04B (transmission) appears in 298 of 307 records, effectively defining the corpus. G02B (optical elements) reaches 41, H04L (digital transmission) 26, and G06N (AI-based computing) only 15 — signal-processing and machine-learning-assisted pointing/tracking claims are a minority position even though several highly-cited records reference them.
Shares are the percentage of the 307 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Free-Space Optical Communication with Eureka
This page is one run against one query. Ask Eureka your own question about free-space optical communication and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Method and apparatus for free space optical communication using incoherent light
A method and apparatus is described for a free space optical communication link that transmits and receives an optical signal using phase incoherent light. In one embodiment, the phase incoherent light source may be a Superluminescent Light Emitting Diode (SLED). Use of phase incoherent light reduces signal scintillation by significantly reducing speckle in the transmitted signal. The result is an optical link that does not need an adaptive optical control loop to correct for speckle and that may modularly replace conventional laser-based phase-coherent free space optical links typically used in free space optical link systems.Filed by ITT Manufacturing Enterprises, published 2005-09-08 as US20050196170A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20180262291A1 | Method for free space optical communication utilizing patterned light and convolutional neural networks | 92 |
| 2 | US20150215040A1 | Free Space Optical Communication Tracking With Electronic Boresight Compensation And Co-Boresighted Transmit … | 80 |
| 3 | US20030090765A1 | Free-space optical communication system | 79 |
| 4 | US20020131123A1 | Free space optical communication network | 69 |
| 5 | US20140016941A1 | High-bandwidth optical communications relay architecture | 61 |
| 6 | US6731878B1 | Free space optical communication link with diversity | 61 |
| 7 | US20040120717A1 | Extended source free-space optical communication system | 55 |
| 8 | US8913894B2 | High-bandwidth optical communications relay architecture | 51 |
| 9 | US20050196170A1 | Method and apparatus for free space optical communication using incoherent light | 40 |
| 10 | US20160112124A1 | Free Space Optical Communication | 37 |
Citation counts inside a searched corpus skew toward older filings simply because they have had more time to accumulate citations; read this as a map of influential prior art, not of current competitive strength.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns worth acting on before drafting new claims or scoping freedom-to-operate in this space.
Transmission claims are the crowded core
Almost the entire corpus touches H04B, meaning generic link-establishment and modulation claims face dense prior art. Differentiated value is more likely found in the smaller G02B and G06N slices, where fewer families compete for claim space.
Two jurisdictions carry most enforceable rights
Europe (46), WIPO (34), Australia (17) and India (14) trail well behind the US and China. A freedom-to-operate review that stops at US and EP filings will miss a substantial share of the active rights in China.
Growth has flattened since the 2024 peak
The climb from 7 families in 2017 to 26 in 2024 was steady rather than sharp, and the most recent tracked years sit at or below that peak. Combined with publication lag, this looks like a maturing filing cadence rather than a fast-growing frontier.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to free-space optical communication, with the prior art for and against each one.
Who is filing, and where the door is still open
Assignee activity is spread across defense contractors, satellite communication specialists and a long tail of single-filing entrants; recent-year momentum has cooled across the most active names.
Leading assignees show no latest-year activity
Several of the most active historical filers, spanning defense, satellite and telecom names, show zero recorded filings in the most recent year. Given the roughly 18-month publication lag, this is more likely a reporting gap than a genuine exit from the field.
Co-filing is rare and mostly bilateral
Only six co-assignee pairs appear in the dataset, and the strongest pair shares just two joint families. Most patent activity in this field is filed by a single assignee rather than through joint ventures or research consortia.
A long tail sits behind a small set of repeat filers
Universities, government research bodies and individual inventors appear alongside defense contractors and satellite operators, suggesting the field is still open to new entrants rather than fully locked up by a handful of incumbents.
| Assignee | Recent year | YoY |
|---|---|---|
| SA Photonics, Inc. | 0 | — |
| Raytheon Company | 0 | — |
| Meta Platforms, Inc. | 0 | — |
| LightPoint Communications Ltd. | 0 | — |
| VAANANEN MIKKO KALERVO | 0 | — |
| CACI Federal, Inc. | 0 | — |
| TeraBeam Corporation | 0 | — |
| King Fahd University of Petroleum and Minerals | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, whitespace filing, or competitive tracking.
Run a freedom-to-operate check on H04B sub-groups
With 298 of 307 families touching H04B, any new transmission or link-establishment claim needs a targeted clearance search rather than a general landscape read.
Explore in EurekaScope claims in the under-claimed branches
G02B, G06N and G01J overlaps are comparatively thin; drafting around adaptive optics or AI-assisted tracking may face less prior art density than core transmission claims.
Explore in EurekaTrack recent-year filings as they publish
Because publication lags filing by about 18 months, the 2025-2026 counts will keep rising; re-pull the trend before concluding the field has cooled.
Explore in EurekaCommon questions about free-space optical communication patents
This dataset identifies 307 patent families published between 2015 and mid-2026 that match free-space optical communication, laser communication terminal or FSO link terminology combined with atmospheric-turbulence, pointing-acquisition-tracking, link-availability, inter-satellite-link or beam-divergence claims, filtered to IPC classes H04B10, G02B27 and B64G1. That scope excludes fiber-only optical systems and generic RF satellite links, so a broader search string would return a larger raw count. Patent families are used rather than raw document counts because they neutralise duplicate filings across jurisdictions and continuation practice.
Filing activity in this corpus includes defense contractors, satellite communication specialists and telecom equipment makers alongside a long tail of universities and individual inventors. Several of the historically most active assignees show no recorded filings in the latest tracked year, though this likely reflects the roughly 18-month publication lag rather than an actual exit from the field. Co-filing between assignees is uncommon, with only six identified co-assignee pairs across the whole dataset, so most rights here are held by single entities rather than joint ventures.
The trend rose from 7 families in 2017 to a peak of 26 in 2024, with the 2022 midpoint at 13, indicating steady rather than explosive growth. Filing counts for 2025 and 2026 appear lower, but publication lag of roughly 18 months means recent years are systematically undercounted at the time of any data pull. The more reliable read is that filing activity plateaued after 2024 rather than declined outright.
H04B (general transmission) is the dominant classification, appearing in 298 of the 307 records, effectively defining the corpus. G02B (optical elements and systems) appears in 41 records, H04L (digital information transmission) in 26, and G06N (AI-based computing) in only 15, indicating that machine-learning-assisted link claims are still a minority. Smaller classes including H04J, G01J, H04W and H04Q each appear in single digits to low double digits, marking areas with comparatively less claim density.
US20050196170A1, assigned to ITT Manufacturing Enterprises and published in 2005, claims a free-space optical link using phase-incoherent light, such as a superluminescent LED, specifically to reduce scintillation and speckle without needing an adaptive optical control loop. Anyone designing an incoherent-light FSO transmitter that avoids adaptive optics for speckle reduction should review this filing's claim scope closely, since it predates much of the corpus and is one of the most-cited records in the dataset. Coherent laser-based systems, or incoherent systems that rely on different scintillation-mitigation methods, are more likely to sit outside its specific claim language, but a formal claim chart is the only way to confirm that.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.