Company lists · Data refreshed October 2026

Top 14 Coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide

RevenueBase identified 116 company matches for coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide as of October 2026 and tracks 974 professional contacts across them, including 44 with verified work emails. Shenzhen is the largest hub.

This list covers company matches for coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 23, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 23, 2026 How this list was built
116Companies
974Contacts tracked
44Verified emails
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The 14 largest coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide

Ranked by team size
Top 14 of 116 company matches for coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 23, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchRedmond, WA, United StatesHQ recorded Oct 23, 202611-5057 contacts →

Exact match

“Optical Transport Pioneers by Nature, Partners by Choice.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
2Exact matchAlmere, NetherlandsHQ recorded Oct 23, 202651-20030 contacts →

Exact match

“Solid Optics specializes in optical transceivers and related products, including custom dark fiber CWDM and DWDM products.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
3Exact matchShenzhen, ChinaHQ recorded Oct 23, 2026501-1,00030 contacts →

Exact match

“Flyin Group Co,Ltd, established in Nov, 2005, is a leading worldwide manufacturer of fiber optic components.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
4Exact matchMainz, GermanyHQ recorded Oct 23, 202651-20026 contacts →

Exact match

“HUBER+SUHNER Cube Optics; Pushing the boundaries of fiber optical transport for more than 20 years Fiber optical transport is the backbone of the global data transmission.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
5Exact matchJiaxing, ChinaHQ recorded Oct 23, 2026501-1,00024 contacts →

Exact match

“Broadex Technologies is a leader in the design and manufacture of passive and active optical components for DWDM, FTTH, data centre and wireless networks.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
6Exact matchRenton, WA, United StatesHQ recorded Oct 23, 202651-20020 contacts →

Exact match

“LIGHTEL supplies a broad spectrum of products and services to customers worldwide.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
7Exact matchUthai District, ThailandHQ recorded Oct 23, 2026501-1,00018 contacts →

Exact match

“HYC Co, Ltd.(HYC) is a one-stop provider of R&D and manufacturing for passive optical components.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
8Exact matchVantaa, FinlandHQ recorded Oct 23, 20261-109 contacts →

Exact match

“BCC Solutions Ltd is one of the leading suppliers and offers advanced solutions for building and maintaining telecommunication networks.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
9Exact matchBucharest, RomaniaHQ recorded Oct 23, 20261-105 contacts →

Exact match

“Start BIT activeaza de peste 20 ani pe piata IT & Cdin Romania cu o dezvoltare continua in distributia echipamentelor de comunicatii.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
10Exact matchMiddleton, WI, United StatesHQ recorded Oct 23, 202611-504 contacts →

Exact match

“Montclair Fiber Optics Inc.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
11Exact matchKraków, PolandHQ recorded Oct 23, 20261-104 contacts →

Exact match

“Specjalizujemy się w dostarczaniu zaawansowanych komponentów służących do budowy wydajnych systemów transmisji danych w sieciach światłowodowych.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
12Exact matchNorth Ryde, AustraliaHQ recorded Oct 23, 20261-103 contacts →

Exact match

“Future proof your multimode fiber network in under 1 hour!”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
13Exact matchShanghai, ChinaHQ recorded Oct 23, 202611-502 contacts →

Exact match

“Howell Optic Communication Technology Co,Ltd is a well-established enterprise engaged in supplying and trading Optical Components.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
14Exact matchStockholm, SwedenHQ recorded Oct 23, 20261-101 contacts →

Exact match

“Opto Dynamics provides you with requested hardware within the ict industry.”

Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase

Showing 14 of 116 coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide

See the full list, filter by size, metro and specialty, and access 44 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide at a glance

As of Oct 23, 2026
4.5%Verified-email coverage
8.4Average contacts per company
51-200Median size (employees)
27.6%Largest-city concentration · Shenzhen
Oct 23, 2026Page data refreshed

Companies by employee count

1-10
21
11-50
22
51-200
46
201-500
15
501-1,000
10
1,001-5,000
1
10001+
1

Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 116 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records worldwide whose business descriptions match “coarse wavelength division multiplexing (cwdm) passive optical filter suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 44 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 23, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “coarse wavelength division multiplexing (cwdm) passive optical filter suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many coarse wavelength division multiplexing (cwdm) passive optical filter suppliers are there worldwide?

RevenueBase identified 116 company matches for coarse wavelength division multiplexing (cwdm) passive optical filter suppliers worldwide as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

XKL tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most coarse wavelength division multiplexing (cwdm) passive optical filter suppliers?

Shenzhen leads with 32 company records, followed by Chengdu (3) and Ae (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 44 professional contacts with verified work emails tracked across these 116 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 23, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.