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Finisar FWLF1621P2T57 CWDM multi-rate OC-48 SFP CWDM 1571nm 80km
up to 2.67 Gb/s CWDM multi-rate OC-48 (2.67G), APD rx SFP transceiver, CWDM 1571nm, up to 80km, industrial temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FWLF1621P2T57
- Family
- FWLF1621P2T
- Category
- Fiber optic transceiver modules
- Datasheet
- FWLF1621P2T57 datasheet (PDF)
FWLF1621P2T57 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FWLF1621P2T57 |
| Product family | FWLF1621P2T |
| Form factor | SFP |
| Standards / application | SONET, Gigabit Ethernet, Fibre Channel; ITU CWDM |
| Data rate | 0.155–2.67 Gb/s |
| Wavelength | 1471/1491/1511/1531/1551/1571/1591/1611 nm (8 CWDM channels) |
| Laser | Cooled DFB (8 CWDM wavelengths) |
| Reach | Total link budget 29 dB @2.488 Gb/s, BER<10⁻¹² |
| Connector | Duplex LC |
| Tx output power | 0 to +5 dBm (EOL) |
| Rx sensitivity | −27 dBm |
| Rx overload / max input | −7 dBm |
| Extinction ratio | 8.2 dB |
| Supply voltage | 3.3 V (3.1–3.5 V) |
| Power dissipation | Supply current 200 typ / 350 max mA |
| Operating temperature | Industrial |
| Diagnostics | Built-in digital diagnostics |
| Compliance | Class 1 laser product (FDA/CDRH, TÜV EN 60950/EN 60825-1/-2, CSA) |
| Lifecycle | Legacy / end-of-life |
| Variant note | Wavelength 1571 nm (clasp color: orange) |
Optical and electrical values are from the Finisar / Coherent family datasheet; temperature grade is per part number. Confirm critical values with us before ordering.
About the Finisar FWLF1621P2T57
The Finisar FWLF1621P2T57 (now a Coherent Corp. product, formerly II-VI) is a SFP CWDM multi-rate OC-48 (2.67G), APD rx optical transceiver for up to 2.67 Gb/s links at CWDM 1571nm over SMF, with reach up to 80km. It is an industrial-temperature part. It belongs to Finisar's FWLF1621P2T family, which has 8 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. This is a legacy Finisar part; we help buyers find remaining stock or a current Coherent alternative. Typical uses: Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
- Up to 2.67 Gb/s bi-directional data links
- Cooled DFB laser transmitter in 8 possible CWDM wavelengths
- Hot-pluggable SFP footprint
- Built-in digital diagnostic functions
- Duplex LC connector
- Single 3.3V power supply
FWLF1621P2T57: frequently asked questions
What is the Finisar FWLF1621P2T57?
The FWLF1621P2T57 is a Finisar SFP transceiver for CWDM multi-rate OC-48 (2.67G), APD rx at up to 2.67 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for Gigabit Ethernet, 1/2/4G Fibre Channel SAN, SONET OC-48 / STM-16 and CWDM/DWDM metro links.
What is the maximum distance of the FWLF1621P2T57?
The FWLF1621P2T57 is specified for up to 80km over SMF. Long-reach optics may need an attenuator on short links; we can advise based on your link loss.
What is the optical power budget of the FWLF1621P2T57?
Per the Finisar family datasheet, the FWLF1621P2T57 transmits 0 to +5 dBm (EOL) and has a receiver sensitivity of −27 dBm. Maximum receiver input is −7 dBm.
Does the FWLF1621P2T57 support DDM / digital diagnostics?
Yes. Built-in digital diagnostics. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FWLF1621P2T57 use?
The FWLF1621P2T57 works at CWDM 1571nm over SMF. CWDM/DWDM optics must match the channel of your mux/demux port. Both ends of a link must use the same optical standard.
Will the FWLF1621P2T57 work in my Cisco, Juniper, Arista or HPE switch?
The FWLF1621P2T57 follows the SFP MSA, so it fits any matching port. It carries Finisar's own EEPROM programming; switches that check the module vendor may need a configuration setting or a vendor-branded optic. Send us your switch model and we confirm before dispatch.
FWLF1621P2T57 vs FWLF1621P2T47: what is the difference?
Both are in Finisar's FWLF1621P2T family. They differ in wavelength (CWDM 1571nm vs CWDM 1471nm). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FWLF1621P2T57 rated for?
The FWLF1621P2T57 is an industrial-temperature part (per Finisar's part-number temperature code). Industrial grade suits outdoor cabinets, telecom huts and plant floors.
What does the FWLF1621P2T57 part number mean?
The FWLF prefix marks Finisar's CWDM / DWDM wavelength-specific SFP family. The I letter in the suffix usually marks the industrial temperature grade. The remaining characters identify the optical design and build variant.
Is the FWLF1621P2T57 still available?
The FWLF1621P2T57 is a legacy Finisar part, so new production is limited or ended. Next Gen Networks helps source remaining genuine stock and can suggest a current Coherent alternative with the same reach and wavelength.
What is the FWLF1621P2T57 price in India and how do I order?
The Finisar FWLF1621P2T57 price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in for a GST quote.
What power does the FWLF1621P2T57 need?
It runs from 3.3 V (3.1–3.5 V) with power dissipation of Supply current 200 typ / 350 max mA.
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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