Optics

Pluggable optics like SFP’s, SFP+’s, QSFP+, XFP’s, CFP’s and the like are used to plug into many devices to transfer data over optical medium like Single Mode and Multi-mode fiber. Optics come in a variety of types that are used for special distance, temperature conditions, wavelength, transmission rate, bandwidth, and specialty uses like tunable needs. Rincon offers new 3rd party Rincon Branded Optics that are designed and coded for use in most all OEM devices including Cisco, Juniper, ALU, etc. We also offer Branded optics from Menara which are also designed and coded for most all OEM devices. Rincon has the expertise to ensure your needs are met with the proper optic. Contact your Rincon Representative today for more information!

The small form-factor pluggable (SFP) is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. The form factor and electrical interface are specified by a multi-source agreement (MSA). It interfaces a network device motherboard (for a switch, router, media converter or similar device) to a fiber optic or copper networking cable. It is a popular industry format jointly developed and supported by many network component vendors. SFP transceivers are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.

SFP transceivers are available with a variety of transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type (e.g. multi-mode fiber or single-mode fiber).

Optical SFP modules are commonly available in several different categories:

for multi-mode fiber

  • SX - 850 nm, for a maximum of 550 m at 1.25 Gbit/s (Gigabit Ethernet) or 150m at 4.25 Gbit/s (Fibre Channel)

for single-mode fiber

  • LX - 1310 nm, for distances up to 10 km
  • EX - 1310 nm, for distances up to 40 km
  • ZX - 1550 nm, for distances up to 80 km, with green extraction lever (see GLC-ZX-SM1)
  • EZX - 1550 nm, for distances up to 120 km
  • BX - 1490 nm/1310 nm, Single Fiber Bi-Directional Gigabit SFP Transceivers, paired as BS-U and BS-D for Uplink and Downlink respectively, also for distances up to 10 km. Variations of bidirectional SFPs are also manufactured which use 1550 nm in one direction.
  • 1550 nm 40 km (XD), 80 km (ZX), 120 km (EX or EZX)
  • SFSW – Single Fiber Single Wavelength transceivers, for bi-directional traffic on a single fiber. Coupled with CWDM, these double the traffic density of fiber links.
  • CWDM and DWDM transceivers at various wavelengths achieving various maximum distances for copper twisted pair cabling
  • 1000BASE-T - these modules incorporate significant interface circuitry and can only be used for Gigabit Ethernet, as that is the interface they implement. They are not compatible with (or rather: do not have equivalents for) Fibre channel or SONET.

The enhanced small form-factor pluggable (SFP+) is an enhanced version of the SFP that supports data rates up to 10 Gbit/s. SFP+ supports 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. It is a popular industry format supported by many network component vendors.

XFP modules are hot-swappable and protocol-independent. They typically operate at near-infrared wavelengths (colors) of 850 nm, 1310 nm or 1550 nm. Principal applications include 10 Gigabit Ethernet, 10 Gbit/s Fibre Channel, synchronous optical networking (SONET) at OC-192 rates, synchronous optical networking STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links. They can operate over a single wavelength or use dense wavelength-division multiplexing techniques. They include digital diagnostics that provide management that were added to the SFF-8472 standard.[1] XFP modules use an LC fiber connector type to achieve high density.

XFP are available with a variety of transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type (e.g. multi-mode fiber or single-mode fiber).

XFP modules are commonly available in several different categories:
  • SR - 850 nm, for a maximum of 300 m
  • LR - 1310 nm, for distances up to 10 km
  • ER - 1550 nm, for distances up to 40 km
  • ZR - 1550 nm, for distances up to 80 km

The XFP packaging was smaller than the XENPAK form-factor which had been published earlier (by almost a year). Some vendors supported both, or the XENPAK follow-ons called XPAK and X2.

The CFP transceiver is specified by a multi-source agreement (MSA) between competing manufacturers. The CFP was designed after the small form-factor pluggable transceiver (SFP) interface, but is significantly larger to support 100 Gbit/s. While the electrical connection of a CFP uses10 x 10 Gbit/s lanes in each direction (RX, TX) the optical connection can support both 10 x 10 Gbit/s and 4 x 25 Gbit/s variants of 100 Gbit/s interconnects (typically referred to as 100GBASE-SR10 in 100 meter MMF, 100GBASE-LR10 and 100GBASE-LR4 in 10 km SMF reach, and 100GBASE-ER10 and 100GBASE-ER4 in 40 km SMF reach respectively.)

CFP transceivers can support a single 100 Gbit/s signal like 100GbE or OTU4 or one or more 40 Gbit/s signals like 40GbE, OTU3, or STM-256/OC-768.

The Quad (4-channel) Small Form-factor Pluggable (often abbreviated as QSFP or QSFP+) is a compact, hot-pluggable transceiver used for data communications applications. It interfaces a network device motherboard (for a switch, router, media converter or similar device) to a fiber optic cable. It is an industry format jointly developed and supported by many network component vendors, supporting data rates from 4x10 Gbit/s. The format specification is evolving to enable higher data rates; as of May 2013, highest supported rate is 4x28 Gbit/s.

The QSFP specification supports Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP+ transceivers are designed to support Serial Attached SCSI, 40G Ethernet, QDR (40G) and FDR (56G) Infiniband, and other communications standards. QSFP modules increase the port-density by 3x-4x compared to SFP+ modules.