Coherent (Finisar) Compatible 100G QSFP28 Optical Transceivers
Product Overview
This page covers the Apex 100G QSFP28 range supplied for platforms that are coded for Finisar and Coherent optics. The modules are third party products built to the QSFP28 MSA; they are not manufactured by, and are not affiliated with, Finisar or Coherent.
The reason these parts exist is simple economics. A 100G port in a live network has to keep working for years, while the price of the original module and the lead time for a new one can make a single failed optic an expensive event. A compatible module with the correct coding brings the same port back up at a fraction of the cost, which is why operators keep a small stock of spares next to the live spares.
Coding is what makes this work. Each module carries an EEPROM image written for the host platform, so the switch accepts the module, reports its values through DDM and links at the expected rate and reach. Tell us the platform and the exact part number you are replacing and we confirm the coding, the grade and the compatibility before the order is released.
Key Features
- 100G QSFP28 range covering SR4, LR4, ER4, CWDM4, PSM4 and ZR4 grades
- EEPROM coded for the platform and part number you name
- Third party product, not manufactured by or affiliated with Finisar or Coherent
- Option to match the original part number on the EEPROM image for drop in replacement
- Digital Diagnostic Monitoring (DDM/DOM) with live optical readings
- Tested on live ports before shipment where a test platform is available
- Stock held on the common grades for same day quoting
- RoHS compliant, supplied with a test report and a 3 year warranty
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-QSFP28-100G-xx (grade dependent) |
| Manufacturer | Apex |
| Product Type | Third party compatible module, QSFP28 MSA |
| Platform Compatibility | Platforms coded for Finisar and Coherent 100G QSFP28 optics |
| Data Rate | 103.1Gbps (4 x 25.78Gbps) |
| Form Factor | QSFP28, hot pluggable |
| Coding | Written to order for the named platform |
| DDM / DOM | Supported |
| Supply Voltage | 3.3V |
| Compliance | QSFP28 MSA, RoHS |
| Temperature | 0 to 70C commercial, -40 to 85C industrial on request |
| Warranty | 3 years |
Ordering Options
Family options are listed below as plain text so they can be copied into an RFQ or a spreadsheet.
| Grade | Reach | Fiber | Interface |
|---|
| SR4 | 100m | Multimode | MPO/MTP |
| CWDM4 | 2km | Single mode | LC duplex |
| LR4 | 10km | Single mode | LC duplex |
| ER4 | 40km | Single mode | LC duplex |
| ZR4 | 80km | Single mode | LC duplex |
| PSM4 | 10km | Single mode | MPO/MTP |
| BiDi | 100m | Multimode or single mode | LC simplex |
Applications
Spares and Replacement
Restores a failed 100G port with a coded module when the original part is out of stock or priced above the link it serves.
Switch and Router Uplinks
Populates 100G uplinks on platforms coded for Finisar or Coherent optics, from 100m in the hall to 80km in the metro.
Metro and DCI Links
Covers 100G metro spans from 2km to 80km with CWDM4, LR4, ER4 and ZR4 grades on the same platform coding.
Compatibility
Compatibility here is a coding question, not a physical one. We ask for the host platform and the part number being replaced, then write the module EEPROM to match, so the switch accepts the module and reports the expected values. Where the platform enforces vendor locking, we say so before the order rather than after. APEX supplies these modules as a third party source: the products are not manufactured by, endorsed by, or affiliated with Finisar or Coherent.
Related Products
Frequently Asked Questions
Are these modules made by Finisar or Coherent?
No. They are third party APEX modules built to the QSFP28 MSA and coded for platforms that accept Finisar or Coherent optics. They are not manufactured by, endorsed by, or affiliated with Finisar or Coherent.
Will a compatible module show up in the switch as the original part?
The coding can be written so the platform accepts the module and reports the expected values. Whether the inventory name matches exactly depends on the platform; tell us the part number and we confirm what the switch will display.
What if the platform enforces vendor locking?
Some platforms check more than the EEPROM image. Send the platform and firmware version and we will say up front whether a compatible module will link, instead of shipping something that is blocked.
Are the common grades in stock?
Yes. SR4, CWDM4, LR4 and ER4 are held in stock and quoted the same day, with ER4, ZR4 and less common grades built to order.
Why Choose Apex
- Optical engineering support and supply from 1.25G to 1.6T, including compatible and coded ranges.
- Coding confirmed against the platform and part number before the order is released.
- Every module is tested for optical power and error rate, with a test report supplied.
- Backed by a 3 year warranty and technical support before and after the sale.
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