Fiber Optic Module Types by Form Factor
Fiber optic modules divide by form factor first, because the form factor decides which host ports accept a module, and then by rate and fibre within each form factor. This guide maps the module types supplied on this site by form factor, and it links to the product pages that carry a listed specification for each type that has one.
What this page covers
This page is a guide page for fiber optic module types. It gathers the models and guidance that belong to this line in one place, and it links to the individual product pages where a model has a listed specification. Lines that have only a title-level mention, with no detailed specification behind them, are described here at category level only and are not given a product page, because a product page without a listed specification would be guessing.
The distinction matters for buying. A category page answers which line a need belongs to and what to ask about; a product page answers the listed figures for one model. If you arrive here looking for a figure for a specific model, follow the link to that model page, and if no model page is linked, the figure is not published on this site and should be asked for in the enquiry rather than inferred from a neighbouring model.
How to specify this line
A usable enquiry for fiber optic module types starts with the rate, the wavelength, the fibre type and the distance, because those four items decide whether a module fits the link at all. The connector and the form factor come next, followed by the operating temperature range and whether digital diagnostics are required. Buyers who send only a rate, or only a model-style name, usually need a second round of questions before a quotation can be confirmed, so including the full set in the first message saves a cycle.
Distance figures deserve special care. A distance quoted for one fibre type does not transfer to another, and a distance quoted for one wavelength does not transfer to a different wavelength. On this site every distance is tied to the fibre and wavelength it was listed with, and where the source pages disagree the conflict is flagged on the page. If a distance matters for your link, name the fibre you will actually install and ask for the figure to be confirmed against that fibre before ordering.
What to confirm before ordering
Before an order is placed, confirm the model, the rate, the wavelength, the distance, the connector and the quantity in writing, and confirm any certification document you need by name. Minimum order quantity and lead time are unavailable at company level on this site, so ask for both per model in the enquiry rather than assuming a company-wide term. Quotations are confirmed per order, and specifications are confirmed per model before payment.
Compatibility is a separate check from the optical figures. A module that matches on rate and wavelength can still fail on a host platform that does not accept it, so name the host platform in the enquiry when compatibility matters. Where this site states a compatibility position, it states the source of that position, and it does not extend a compatibility statement from one model to another. If the platform is not named, compatibility cannot be confirmed from this page alone.
Types by form factor on this site
By form factor, this site covers SFP modules for 1.25G and 10G links, QSFP modules for 40G and 100G links, and QSFP-DD modules for 400G links. Each form factor has at least one product page with a listed specification, and the product pages are the only place on this site where a module's figures are published. A form factor name alone, such as SFP or QSFP, never selects a module, because the same form factor carries different rates, wavelengths and reaches.
The form factor also decides the connector family in most cases, but not always, and the 40G product page on this site is the proof: its source pages disagree about the connector, and the page flags the conflict rather than resolving it from the form factor. Form factor is a starting point for selection, not a substitute for checking the connector, wavelength and distance on the product page.
Models on this page
BIDI 1.25G SFP Module
SFP form factor.
QSFP 40G SR4 Module
QSFP form factor.
400GBASE-DR4 QSFP-DD Module
QSFP-DD form factor.
Enquiry checklist
Before sending an enquiry, note the model or the rate you need, the wavelength, the fibre type, the distance, the connector, the quantity and the application. State whether the module must be compatible with a named host platform, and name any certification document you need. Minimum order quantity and lead time are unavailable at company level and are confirmed per model in the enquiry. Quotations are confirmed per order.
Send an enquiry | Sales contact: Ms. Vicky Tian, Sales Manager, +86 19860146913 | Telephone: 86-0755-82552969 | Email: dsale@topsfp.com
Frequently asked questions
How do I get a quotation?
Send an enquiry naming the model, the rate, the wavelength, the distance and the quantity you need, plus the application. Quotations are confirmed per order, and specifications are confirmed per model before payment. This site does not list fixed selling figures, and no price is shown for any model.
What certification documents can you provide?
The company states ISO 9001, CE, FC, 3C and RoHS names. Certificates are available upon request. If a buyer needs a certificate for a specific model, name the model in the enquiry so the correct document can be checked. No certificate numbers are published on this site.
Do the specifications on one page apply to the whole range?
No. Specifications are shown per model and must not be read across the whole range. Where a value is not listed for a model, the page says to confirm per model rather than filling in a generic figure, and where the source pages disagree, the page flags the conflict instead of choosing one value as fact.
What are the minimum order quantity and lead time?
At company level both are unavailable on this site and are confirmed per model in the enquiry. A single-model note, where one exists, is marked as applying to that model only and must not be read as a company-wide term.