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Finisar FWLF-1631-57 DWDM SFP 1531.90nm
up to 2.67 Gb/s DWDM SFP SFP transceiver, 1531.90nm (195.7THz, ITU ch57).
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FWLF-1631-57
- Family
- FWLF-1631
- Category
- Fiber optic transceiver modules
- Datasheet
- FWLF-1631-57 datasheet (PDF)
FWLF-1631-57 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FWLF-1631-57 |
| Product family | FWLF-1631 |
| Form factor | SFP |
| Standards / application | OC-48 LR-2 |
| Data rate | 0.155–2.7 Gb/s (SONET OC-3/12/48) |
| Wavelength | 100 GHz ITU grid C-band, 45 channels: ch17 191.7 THz/1563.86 nm to ch61 196.1 THz/1528.77 nm |
| Laser | Temperature-stabilized DWDM-rated low-dispersion DFB |
| Receiver | APD |
| Reach | Total link budget 28–30 dB @2.5 Gb/s, BER<10⁻¹²; dispersion penalty 3.0 dB @120 km |
| Tx output power | 0 to +4 dBm |
| Rx sensitivity | −28 dBm @ BER<10⁻¹² (−30 dBm @ BER<10⁻⁹) |
| Rx overload / max input | −9 dBm; damage threshold +6 dBm |
| Extinction ratio | 8.2 dB |
| Supply voltage | 3.3 V (3.13–3.50 V) |
| Power dissipation | 1.25 W max (Icc 380 mA) |
| Operating temperature | −5 to 70 °C case |
| Compliance | RoHS compliant, lead free; CDRH and IEC-825 Class 1 |
| Lifecycle | Legacy / end-of-life |
| Variant note | ITU 100 GHz channel 57 (ordering table: 57 = 195.7 THz) |
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 FWLF-1631-57
The Finisar FWLF-1631-57 (now a Coherent Corp. product, formerly II-VI) is a SFP DWDM SFP optical transceiver for up to 2.67 Gb/s links at 1531.90nm (195.7THz, ITU ch57) over SMF. It belongs to Finisar's FWLF-1631 family, which has 45 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 2.7 Gb/s bi-directional data links
- Hot-pluggable SFP footprint
- Temperature-stabilized DWDM-rated DFB laser transmitter
- 100 GHz ITU Grid, C Band
- Extended link budget with APD receiver technology
- RoHS compliant and lead free
FWLF-1631-57: frequently asked questions
What is the Finisar FWLF-1631-57?
The FWLF-1631-57 is a Finisar SFP transceiver for DWDM SFP 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 FWLF-1631-57?
Share your link length and fibre type and we will confirm the reach of the FWLF-1631-57 from the Finisar datasheet before you order.
What is the optical power budget of the FWLF-1631-57?
Per the Finisar family datasheet, the FWLF-1631-57 transmits 0 to +4 dBm and has a receiver sensitivity of −28 dBm @ BER<10⁻¹² (−30 dBm @ BER<10⁻⁹). Maximum receiver input is −9 dBm; damage threshold +6 dBm.
Which fiber and connector does the FWLF-1631-57 use?
The FWLF-1631-57 works at 1531.90nm (195.7THz, ITU ch57) 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 FWLF-1631-57 work in my Cisco, Juniper, Arista or HPE switch?
The FWLF-1631-57 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.
FWLF-1631-57 vs FWLF-1631-17: what is the difference?
Both are in Finisar's FWLF-1631 family. They differ in wavelength (1531.90nm (195.7THz, ITU ch57) vs 1563.86nm (191.7THz, ITU ch17)). Pick the variant that matches your temperature, latch and wavelength needs.
What does the FWLF-1631-57 part number mean?
The FWLF prefix marks Finisar's CWDM / DWDM wavelength-specific SFP family. The remaining characters identify the optical design and build variant.
Is the FWLF-1631-57 still available?
The FWLF-1631-57 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 FWLF-1631-57 price in India and how do I order?
The Finisar FWLF-1631-57 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 FWLF-1631-57 need?
It runs from 3.3 V (3.13–3.50 V) with power dissipation of 1.25 W max (Icc 380 mA).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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