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50G ER QSFP28 40KM Transceiver

Model:LNK-SFP50G-ER

Ø Compliant with QSFP28 Standard:
SFF-8665 Revision 1.9, SFF-8636 Revision 2.10a

Ø Compliant with IEEE 802.3cn_D2p0 50GBASE-ER

Ø Compliant with IEEE802.3 50GAUI-2 C2M electrical interface

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50G ER QSFP28 40KM Transceiver

Optical and Electrical Characteristics

Transmitter Optical Specifications

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Wavelength	λ	1304.5	1311	1317.5	nm
Side-mode suppression ratio	SMSR	30			dB
Average launch power	POUT	0.4	-	6.63	dBm
Average launch power of OFF transmitter	POUT_OFF	-	-	-15	dBm
Outer Optical Modulation Amplitude (OMAouter)	POUTL	3.4	-	7.4	dBm
Extinction ratio	ER	6	-	-	dB
Launch power in OMAouter minus TDECQ	OMA-TDECQ	2	-	-	dBm
Transmitter and dispersion eye closure for PAM4 (TDECQ)	TDECQ	-	-	3.2	dB	Note
Transmitter reflectance		-	-	-26	dB

Note: Measured with a PRBS215-1 test pattern @53.125Gbps, 40km fiber.

Receiver Optical Specifications

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Wavelength	λ	1304.5	1311	1317.5	nm
Receiver sensitivity (OMAouter)				max(−15.1, SECQ − 16.5)	dBm	Note
Damage Threshold	P_damage	-2.37	-	-	dBm
Overload		-3.37	-	-	dBm
Average Receive Power	-	-17.6	-	-3.37	dBm
Receive power (OMAouter)	OMA	-	-	-2.6	dBm
Receiver Reflectance	RXR	-	-	-26	dB
LOS assert	LOSA	-30			dBm
LOS de-assert	LOSD			-20	dBm
LOS hysteresis	LOSH	0.5			dB