HTF 50G QSFP28 ER 40KM HTQS-FIS2LR is a 50 Gbps transceiver module for optical communication applications compliant to 50G ER requirement. The module converts 2 inputs channels of 25Gbps electrical data to single PAM4 optical signals for 50Gbps optical transmission. Reversely on the receiver side, the module receives 50Gbps PAM4 optical signals and then converts them to electrical data for 2 output channels.
The central wavelength of the optical channel is 1310nm. For SMF applications, the transceiver module has an operating range up to 40km SMF with nominal bit rate of 26.5625 Gbaud/s.
HTF HTQS-FIS2LR is designed with QSFP28 form factor, optical/electrical connection and I2C interface according to the SFF series standard.
The HTF HTQS-FIS2LR 50G QSFP28 ER 40KM modules offer customers 50Gb/s electrical interface compliant with CEI- 28G-VSR standard for 50GAUI-2 with 2X25Gb/s high speed CML signal and 50Gb/s PAM4 optical interface, up to 40km reach on single mode fiber for 50G ER application.
OPTICAL CHARACTERISTICS
50G QSFP28 ER 40KM
Parameter | Symbol | Min. | Typ. | Max. | Units | Ref. |
Transmitter | ||||||
Signaling speed per lane | 26.5625 | GBd/s | ||||
Data rate variation | -100 | +100 | ppm | |||
Modulation format | PAM4 | |||||
Lane center wavelength | WL | 1304.5 | 1317.5 | nm | ||
Side mode suppression ratio (SMSR) | SMSRmin | 30 | dB | |||
Average launch power | Pave | 0.4 | 6.6 | dBm | ||
Optical modulation amplitude | Poma | 3.4 | 7.4 | dBm | ||
Launch power in OMA minus TDECQ | 2 | dBm | ||||
Transmitter and dispersion eye closure for PAM4 | TDECQ | - | - | 3.2 | dB | 1 |
Average launch power of OFF transmitter, each lane | Poff | -15 | dBm | |||
Optical extinction ratio | ER | 6 | dB | |||
Transmitter reflectance | TXref | -26 | dB | |||
Optical return loss tolerance | ORLT | 15 | dB | |||
Relative intensity noise | RIN | -132 | dB/Hz | |||
Receiver | ||||||
Signaling speed per lane | 26.5625 | GBd/s | ||||
Data rate variation | -100 | +100 | ppm | |||
Modulation format | PAM4 | |||||
Lane center wavelength | WL | 1304.5 | 1317.5 | nm | ||
Receiver sensitivity (OMAouter) | Sens | -15.1 | dBm | 1 | ||
Overload receiver power | Povl | -3.4 | dBm | 1 | ||
Receiver reflectance | RXref | -26 | dB | |||
Stressed sensitivity (OMA) | -13.3 | dBm | ||||
Conditions of stressed receiver sensitivity test: | ||||||
Stressed eye closure for PAM4 (SECQ) | 3.2 | dB | ||||
Links | ||||||
Power budget | 20.3 | dB | ||||
Operating distance | 40 | km | ||||
Discrete reflectance | ‐26 | dB |
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