- Home
- Optical Transceivers
- Finisar (Coherent)
- 2G–4G
- FWLF1634RV40
Actual product photos
available on request
To keep listings accurate, we share real photos of the exact FWLF1634RV40 stock you will receive, including the label, serial number and packaging.
Request photos from our teamPhotos are usually shared within working hours on WhatsApp or email.
Finisar FWLF1634RV40 DWDM 4G FC + GbE, APD rx SFP 1545.32nm 80km class
up to 4.25 Gb/s DWDM 4G FC + GbE, APD rx (rate select) SFP transceiver, 1545.32nm (194.0THz, ITU ch40), up to 80km class, commercial (−5 to 70 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FWLF1634RV40
- Family
- FWLF1634RV
- Category
- Fiber optic transceiver modules
- Datasheet
- FWLF1634RV40 datasheet (PDF)
FWLF1634RV40 specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FWLF1634RV40 |
| Product family | FWLF1634RV |
| Form factor | SFP |
| Standards / application | 4x FC; 1x/2x FC, GbE and OC-48 LR-2 (rate-select option) |
| Data rate | 0.155–4.25 Gb/s |
| 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 26–30 dB @4.25 Gb/s; 31–34 dB @2.5 Gb/s (BER<10⁻¹²) |
| Tx output power | +2 to +5 dBm |
| Rx sensitivity | −28 dBm @2.5 Gb/s; −23 dBm @4.25 Gb/s (BER<10⁻¹²) |
| Rx overload / max input | −9 dBm; damage threshold +6 dBm |
| Extinction ratio | 6.0 dB (≤4.25G); 8.2 dB SONET (rate-select option) |
| Supply voltage | 3.3 V (3.13–3.50 V) |
| Power dissipation | 1.25 W max (Icc 325 mA typ) |
| Operating temperature | Commercial (−5 to 70 °C) |
| Diagnostics | Digital diagnostics per Finisar AN-2030; enhanced features per DWDM SFP MSA (A2h: laser current, temperature, Tx/Rx power) |
| Compliance | Class 1 laser product |
| Lifecycle | Legacy / end-of-life |
| Variant note | y = V: rate select; ITU 100 GHz channel 40 (ordering table: 40 = 194.0 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 FWLF1634RV40
The Finisar FWLF1634RV40 (now a Coherent Corp. product, formerly II-VI) is a SFP DWDM 4G FC + GbE, APD rx (rate select) optical transceiver for up to 4.25 Gb/s links at 1545.32nm (194.0THz, ITU ch40) over SMF, with reach up to 80km class. It is a commercial-temperature part rated −5 to 70 °C. It belongs to Finisar's FWLF1634RV 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 4.25 Gb/s bi-directional links
- Hot-pluggable SFP footprint
- Temperature-stabilized DWDM-rated DFB laser transmitter
- 100 GHz ITU Grid, C-Band
- Wavelength controlled within ±0.1 nm over life and temperature
- Extended link budget with APD receiver technology
FWLF1634RV40: frequently asked questions
What is the Finisar FWLF1634RV40?
The FWLF1634RV40 is a Finisar SFP transceiver for DWDM 4G FC + GbE, APD rx (rate select) at up to 4.25 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 FWLF1634RV40?
The FWLF1634RV40 is specified for up to 80km class 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 FWLF1634RV40?
Per the Finisar family datasheet, the FWLF1634RV40 transmits +2 to +5 dBm and has a receiver sensitivity of −28 dBm @2.5 Gb/s; −23 dBm @4.25 Gb/s (BER<10⁻¹²). Maximum receiver input is −9 dBm; damage threshold +6 dBm.
Does the FWLF1634RV40 support DDM / digital diagnostics?
Yes. Digital diagnostics per Finisar AN-2030; enhanced features per DWDM SFP MSA (A2h: laser current, temperature, Tx/Rx power). Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which fiber and connector does the FWLF1634RV40 use?
The FWLF1634RV40 works at 1545.32nm (194.0THz, ITU ch40) 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 FWLF1634RV40 work in my Cisco, Juniper, Arista or HPE switch?
The FWLF1634RV40 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.
FWLF1634RV40 vs FWLF1634RV17: what is the difference?
Both are in Finisar's FWLF1634RV family. They differ in wavelength (1545.32nm (194.0THz, ITU ch40) vs 1563.86nm (191.7THz, ITU ch17)). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FWLF1634RV40 rated for?
The FWLF1634RV40 is a commercial-temperature part rated −5 to 70 °C. Choose an industrial (T) variant for outdoor or uncontrolled sites.
What does the FWLF1634RV40 part number mean?
The FWLF prefix marks Finisar's CWDM / DWDM wavelength-specific SFP family. The C letter in the suffix usually marks the commercial temperature grade. The remaining characters identify the optical design and build variant.
Is the FWLF1634RV40 still available?
The FWLF1634RV40 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 FWLF1634RV40 price in India and how do I order?
The Finisar FWLF1634RV40 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 FWLF1634RV40 need?
It runs from 3.3 V (3.13–3.50 V) with power dissipation of 1.25 W max (Icc 325 mA typ).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
Related Finisar parts
FWLF1634RV17DWDM 4G FC + GbE, APD rx, 80km classFWLF1634RV18DWDM 4G FC + GbE, APD rx, 80km classFWLF1634RV19DWDM 4G FC + GbE, APD rx, 80km classFWLF1634RV20DWDM 4G FC + GbE, APD rx, 80km classFWLF1634RV21DWDM 4G FC + GbE, APD rx, 80km classFWLF1634RV22DWDM 4G FC + GbE, APD rx, 80km classGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
Talk to Sales