Ascent Communication Technology

40G QSFP+ CWDM 2 km

Ascent’s QSFP-AQ-LP-W4-02 is designed to operate over single-mode fiber system using 4X10 CWDM channel in 1310 band and links up to 2km. The module converts 4 inputs channel of 10Gb/s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 40Gb/s optical transmission. Reversely, on the receiver side, the module optically de-multiplexes a 40Gb/s input into 4 CWDM channels signals, and converts them to 4 channel output electrical data.

• 4 CWDM lanes Mux/Demux design

• Up to 11.1 Gbps data rate per wavelength

• Up to 2 km transmission on SMF

• Electrically hot-pluggable

• Digital Diagnostics Monitoring Interface

• Compliant with QSFP+ MSA with LC connector

• Case operating temperature range: 0 °C to +70 °C

• Power dissipation < 2.5 W

• Compliant with IEEE 802.3ba

• Compliant with SFF-8436

• RoHS compliant

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	Ts	‑40	‑	85	°C
Relative Humidity	RH	5	‑	95	%
Power Supply Voltage	VCC	‑0.3	‑	4	V
Signal Input Voltage		Vcc‑0.3	‑	Vcc+0.3	V
Damage threshold		3.4			dBm

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Case Operating Temperature	Tcase	0	‑	70	°C	Without air flow
Power Supply Voltage	V_CC	3.14	3.3	3.47	V
Power Supply Current	I_CC	‑		760	mA
Data Rate	BR		10.3125		Gbps	Each channel
Transmission Distance	TD		‑	2	km
Coupled Fiber	Single‑mode Fiber					9/125 µm SMF

Optical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Transmitter
Center Wavelength	λ₀	1264.5	1271	1277.5	nm
	λ₁	1284.5	1291	1297.5	nm
	λ₂	1304.5	1311	1317.5	nm
	λ₃	1324.5	1331	1337.5	nm
Total Output Power	P_OUT			8.3	dBm
Average Launch Power per Lane		‑7		1	dBm
Spectral Width	σ			1	nm
SMSR		30			dB
Optical Extinction Ratio	ER	3.5			dB
Average Launch Power Off per Lane	Poff			‑30	dBm
Transmitter and Dispersion Penalty per Lane	TDP			2.3	dB
RIN	RIN			‑128	dB/Hz
Output Eye Mask	Compliant with IEEE 802.3ba
Receiver
Rx Sensitivity per Lane	R_SENS			‑11.5	dBm	1
Input Saturation Power (Overload)	Psat	1			dBm
Receiver Reflectance	Rr			‑26	dB

Notes:

1. Measured with a PRBS 2³¹‑1 test pattern, @ 10.325 Gb/s, BER<10^‑12.

Electrical Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Supply Voltage	Vcc	3.13	3.3	3.47	V
Supply Current	Icc			760	mA
Transmitter
Input Differential Impedance	Rin		100		Ω	1
Differential Data Input Swing	Vin, pp	180		1000	mV
Transmit Disable Voltage	VD	Vcc‑1.3		Vcc	V
Transmit Enable Voltage	VEN	Vee		Vee+0.8	V	2
Receiver
Differential Data Output Swing	Vout, pp	300		850	mV	3
LOS Fault	VLOS fault	Vcc‑1.3		VccHOST		4
LOS Normal	VLOS norm	Vee		Vee+0.8		4