This dataset identifies 101 patent families published between 2015 and mid-2026 that combine fiber or fibre laser claims with Q-switch, acousto-optic, mode-locking or pulse-shaping modulator elements, classified under H01S3/11, H01S3/117 and G02F1/33. That count reflects families, which is the fairer unit than raw document counts since it strips out duplicate filings of the same invention across jurisdictions. The true current total is likely higher because publication lags filing by roughly eighteen months, so 2025-2026 filings are still arriving in the record.

Filing activity peaked at 10 families in 2021 and then dropped sharply, with the 2022 midpoint year recording only 1 family. Taken at face value this looks like a clear slowdown, but the most recent years in any patent trend are always undercounted because of publication lag, so 2025 and 2026 figures should not yet be read as a confirmed decline. A more reliable read will only be possible once those years finish publishing.

The assignee ranking includes established US laser specialists such as IMRA America and Coherent, Chinese research institutions including the Shanghai Institute of Optics and Fine Mechanics and Colorado State University, and a long tail of Chinese commercial laser manufacturers such as Wuhan Raycus. Notably, none of the leading assignees in this dataset recorded a filing in the most recent tracked year, which is consistent with the broader slowdown from the 2021 peak. No single filer holds an overwhelming share, so this reads as a field with distributed rather than concentrated ownership.

The IPC breakdown shows the field is almost entirely concentrated in H01S, the core lasers and stimulated-emission subclass, with only thin secondary activity in G02F optical control (9 records), G02B optical elements (8) and G01N material analysis (6). That thinness suggests under-claimed territory where modulator designs intersect with optical-control circuitry, precision measurement, or materials analysis rather than sitting purely inside the laser cavity. A first claim in these adjacent branches would need to tie the modulator function explicitly to the secondary application, such as pulse-shaping hardware integrated into a measurement or diagnostic system, to avoid the dense H01S prior art.

Start with the most-cited records in this dataset, which include US6590910B2 and the related US20020071454A1 on actively mode-locked fiber lasers with controlled chirp output, and US20060007965A1 on passive Q-switch modulated fiber lasers; their high citation counts indicate they anchor claim language still referenced by later filings. Citation counts inside a searched corpus favour older records simply because they have had longer to accumulate citations, so treat these as signals of influence on the field's vocabulary rather than a definitive list of currently enforceable blocking claims. A claim-by-claim comparison against the specific pulse-shaping or Q-switch mechanism in a new design is still necessary.