Optical Wavelength Division Multiplexing

Techniques for combining and separating multiple optical signals at different wavelengths over a single optical fiber, including components like filters, comb sources, and tunable add/drop multiplexers.

5,047 US filings from 827 companies since 2023 · 2023: 1,345 · 2024: 1,567 · 2025: 1,451 · 2026 YTD: 684

Multiplex Communication

Top companies

Ranked by filings in this theme since 2023. 2026 is partial.

#	Company	Since 2023	2023	2024	2025	2026 YTD	YoY
1	Nippon Telegraph and Telephone Corporation	352	107	147	90	8	-38.8%
2	Huawei Technologies Co., Ltd.	309	93	88	81	47	-8.0%
3	NEC CORPORATION	223	50	76	67	30	-11.8%
4	CORNING RESEARCH & DEVELOPMENT CORPORATION	144	47	42	40	15	-4.8%
5	Cisco Technology, Inc.	130	37	45	34	14	-24.4%
6	COMMSCOPE TECHNOLOGIES LLC	113	37	35	31	10	-11.4%
7	Ciena Corporation	110	23	32	34	21	+6.2%
8	Nokia Solutions and Networks Oy	97	18	36	27	16	-25.0%
9	II-VI DELAWARE, INC.	94	23	30	24	17	-20.0%
10	Fujitsu Limited	93	29	30	23	11	-23.3%
11	Sumitomo Electric Industries, Ltd.	72	23	18	23	8	+27.8%
12	VIAVI Solutions Inc.	64	20	22	15	7	-31.8%
13	CORNING INCORPORATED	59	14	19	15	11	-21.1%
14	Cable Television Laboratories, Inc.	56	17	17	18	4	+5.9%
15	Infinera Corporation	55	24	14	14	3	0.0%
16	Mellanox Technologies, Ltd.	52	18	12	14	8	+16.7%
17	ZTE Corporation	50	16	13	11	10	-15.4%
18	FUJITSU OPTICAL COMPONENTS LIMITED	48	18	14	14	2	0.0%
19	AT&T Intellectual Property I, L.P.	47	8	15	12	12	-20.0%
20	NTT, Inc.	47	·	·	14	33	—
21	Mitsubishi Electric Corporation	46	14	17	10	5	-41.2%
22	US Conec Ltd.	46	12	24	7	3	-70.8%
23	Lumentum Operations LLC	44	9	13	16	6	+23.1%
24	Telefonaktiebolaget LM Ericsson (publ)	41	10	18	6	7	-66.7%
25	PsiQuantum, Corp.	41	11	11	13	6	+18.2%