Does the LS-DW3910-40I utilize a cooled EML laser or a standard DFB laser to hold its 1546.12nm line?

It integrates a highly precise, cooled Electro-absorption Modulated Laser (EML) to completely prevent wavelength drift across the dense 100GHz C-Band channel spectrum.

Does the DOM circuitry monitor internal power supply voltage variations caused by unstable solar/battery power grids at remote cell sites?

Yes, the real-time digital optical diagnostics report precise internal module voltage fluctuations, protecting the laser from power anomalies.

Does the transceiver design comply with RoHS and CE hazardous substance guidelines for deployment across dense EU public sectors?

Yes, the product is fully certified with RoHS, CE, and FCC stamps, fulfilling all necessary regulatory frameworks for global infrastructure rollout.

Can this specific module run on an active 100GHz ITU-T grid system alongside adjacent DWDM channels?

Yes, it is fixed to Channel 39 (1546.12nm) on the standard 100GHz grid, ensuring clean channel separation without bleeding into neighboring bands.

Can this module run reliably over legacy G.652.D dark fiber that has multiple physical fusion splices along the path?

Yes, it is fully optimized for standard single-mode fiber (SMF) grids, but you must ensure the cumulative insertion loss from the fusion splices doesn't exceed the module's maximum optical link budget safety margins. We highly recommend conducting an OTDR trace to verify that the total attenuation falls well within the transceiver’s rated receiver sensitivity limits.

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LINK-PP LS-DW3910-40I C39 10G SFP+ DWDM 1546.12nm 40km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)

Name: LINK-PP LS-DW3910-40I C39 10G SFP+ DWDM 1546.12nm 40km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
Brand: LINK-PP
SKU: 198548
Price: 257.14 USD
Availability: InStock
Rating: 4.9 (38 reviews)

# 198548

Product: LINK-PP LS-DW3910-40I C39 10G SFP+ DWDM 1546.12nm 40km Duplex LC/UPC DOM SMF Optical Transceiver Module (Industrial)
SKU: 198548
P/N: LS-DW3910-40I
Price: $ 299
Stock: 232 in Stock
Sold: 977
Product URL: https://www.l-p.com/products/489088.htm

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Compatible:: Cisco; LINK-PP; Arista; Brocade; Ciena; Dell; Extreme; FS; Generic; H3C; HW; Juniper; MRV; Netgear

Wavelength:: C17; C18; C19; C20; C21; C22; C23; C24; C25; C26; C27; C28; C29; C30; C31; C32; C33; C34; C35; C36; C37; C38; C39; C40

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LINK-PP LS-DW3910-40I C39 10G SFP+ Specifications

LS-DW3910-40I integrates a cooled EML transmitter and a PIN receiver into an industrial-grade 10G SFP+ DWDM optical module, guaranteeing precise 1546.12nm optical signaling and comprehensive DOM diagnostics over single-mode fiber runs up to 40km.

LINK-PP Part Number	LS-DW3910-40I	Vendor Name	LINK-PP
Form Factor	SFP+	Max Data Rate	10.7Gbps
Wavelength	1546.12nm	Max Cable Distance	40km
Connector	Duplex LC	Media	SMF
Transmitter Type	EML	Receiver Type	PIN
TX Power	-1 to +2dBm	RX Power	-16 to -1dBm
Receiver Sensitivity	<-15.5dBm	DOM Support	Yes
Operating Temperature Range	-40 to 85°C	Protocols	SFP+ MSA Compliant, CPRI, eCPRI

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Q: Does the LS-DW3910-40I utilize a cooled EML laser or a standard DFB laser to hold its 1546.12nm line? By C***e on 2026-05-04

A: It integrates a highly precise, cooled Electro-absorption Modulated Laser (EML) to completely prevent wavelength drift across the dense 100GHz C-Band channel spectrum. By admin on 2026-05-05
Q: Does the DOM circuitry monitor internal power supply voltage variations caused by unstable solar/battery power grids at remote cell sites? By J***r on 2026-01-18

A: Yes, the real-time digital optical diagnostics report precise internal module voltage fluctuations, protecting the laser from power anomalies. By admin on 2026-01-19
Q: Does the transceiver design comply with RoHS and CE hazardous substance guidelines for deployment across dense EU public sectors? By H***t on 2025-10-21

A: Yes, the product is fully certified with RoHS, CE, and FCC stamps, fulfilling all necessary regulatory frameworks for global infrastructure rollout. By admin on 2025-10-22
Q: Can this specific module run on an active 100GHz ITU-T grid system alongside adjacent DWDM channels? By L***h on 2025-07-05

A: Yes, it is fixed to Channel 39 (1546.12nm) on the standard 100GHz grid, ensuring clean channel separation without bleeding into neighboring bands. By admin on 2025-07-06
Q: Can this module run reliably over legacy G.652.D dark fiber that has multiple physical fusion splices along the path? By M***n on 2025-04-10

A: Yes, it is fully optimized for standard single-mode fiber (SMF) grids, but you must ensure the cumulative insertion loss from the fusion splices doesn't exceed the module's maximum optical link budget safety margins. We highly recommend conducting an OTDR trace to verify that the total attenuation falls well within the transceiver’s rated receiver sensitivity limits. By admin on 2025-04-11

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F***l

Denmark

Verified Purchase

5 .0

2026-05-02

Excellent EML DWDM laser stability with zero CRC errors over a 38km fiber span.

53 Helpful vote Comments

W***y

Philippines

Verified Purchase

5 .0

2026-04-21

Highly impressed with the industrial operating temperature (-40 to 85°C). We use these in uncooled roadside cabinets for traffic management networks. They handle temperature spikes easily without affecting the 10Gbps line rate.

33 Helpful vote Comments

Z***m

Malaysia

Verified Purchase

5 .0

2026-02-25

These EML DWDM lasers are incredibly stable. We run a tight 100GHz grid spacing and channel crosstalk can be an issue with cheaper optics, but these hold their 1546.12nm frequency perfectly. Will buy more for our next PoP upgrade.

102 Helpful vote Comments

C***e

Norway

Verified Purchase

5 .0

2026-01-15

Real-time DOM telemetry is accurate and the 1546.12nm wavelength is perfectly stable.

49 Helpful vote Comments

T***y

India

Verified Purchase

4 .0

2026-01-05

Optics work great on our routers. The Duplex LC/UPC interface fits cleanly. I dropped one star because the tracking number didn't update for the first 3 days after shipping. Customer service responded quickly and provided the correct status though. Overall, good value for enterprise fiber projects.

26 Helpful vote Comments

B***h

Sweden

Verified Purchase

5 .0

2025-12-03

Excellent customer support from LINK-PP. They verified our compatibility matrix before shipping the LS-DW3910-40I. Deployed into our network infrastructure and had zero issues. Stable +1dBm output power level.

37 Helpful vote Comments

S***h

Brazil

Verified Purchase

5 .0

2025-11-17

Excellent performance on long-haul multi-wavelength links. This 1546.12nm C-Band SFP+ module integrated perfectly into our existing 100GHz grid architecture. We replaced some older, power-hungry tunable transceivers with these fixed-wavelength ones to cut down on heat generation in our dense aggregation racks. The thermal dissipation on these LINK-PP modules is highly efficient; they stay cool even under full 10G line rate stress. Digital Optical Monitoring (DOM) tracks voltage, temperature, and bias currents precisely. The optical link remains rock solid even during high attenuation periods due to fiber aging or patch cord shifts. A premium product that rivals any Tier-1 OEM brand in structural integrity and optical clarity.

153 Helpful vote Comments

Y***h

Hong Kong

Verified Purchase

5 .0

2025-10-30

Outstanding link budget on these 40km SFP+ modules. We are running them across a 32km span through multiple patch bays, and the receiver sensitivity holds strong at -13.1dBm. Great value for high-density deployments. ✨

66 Helpful vote Comments

V***n

United States

Verified Purchase

5 .0

2025-08-14

Solid build quality. The 1546.12nm fixed wavelength is perfect for matching our passive C-Band Mux infrastructure. We’ve had 30 of these modules running for 2 months with zero CRC errors or interface drops. Excellent 10G solution.

19 Helpful vote Comments

P***r

Belgium

Verified Purchase

5 .0

2025-08-04

These are exceptional for base station backhaul and extreme edge topologies. We deployed 24 units of this industrial 10G SFP+ DWDM 40km model into our outdoor unconditioned cabinets for an eCPRI/CPRI mobile backhaul upgrade. Standard commercial-grade optics always die during our peak winter freezes or summer heatwaves, but these industrial temperature (-40 to 85°C) optics are absolute beasts. Last week, our remote cabinet internal probe logged 73°C, but the transceiver didn't drop a single frame. The DOM telemetry is fully integrated into our SNMP monitoring stack, allowing us to watch the laser bias current and internal temperature in real-time. The Duplex LC/UPC connector click is tight and secure, showing zero micro-bending loss even when vibrating on the tower rack. LINK-PP delivers identical hardware layers for a fraction of the cost. Highly recommended!

142 Helpful vote Comments

D***k

Switzerland

Verified Purchase

5 .0

2025-07-08

Rock-solid 40km link over single-mode fiber, running on our switches flawlessly.

26 Helpful vote Comments

R***n

Italy

Verified Purchase

5 .0

2025-06-23

Outstanding optical performance. We deployed these transceivers on a 35km dark fiber span to bridge two regional points of presence (PoPs). Since we utilize a passive DWDM Mux/Demux setup, wavelength stability is paramount. A minor frequency drift can cause adjacent channel crosstalk and ruin the entire fiber strand's throughput. These 10G DWDM 1546.12nm modules hold their center frequency flawlessly. Even under heavy aggregation traffic from our broadband access networks, the internal DDM shows zero fluctuation in wavelength accuracy. Our routers accepted the modules immediately as native compatible devices. The optical link budget on this 40km module is surprisingly forgiving—our RX power reads -12.1dBm, leaving a solid safety margin before the receiver overload limit or sensitivity floor. LINK-PP has definitely nailed the manufacturing process on these modules.

91 Helpful vote Comments

E***g

Belarus

Verified Purchase

5 .0

2025-06-09

They were very professional.I will definitely buy from them again.

76 Helpful vote Comments

X***e

United Arab Emirates

Verified Purchase

5 .0

2025-05-28

Complete compatibility across our edge routing platforms. SFP+ MSA compliance means it just works. The Duplex LC/UPC optical ports provide a very firm, reassuring click when patching single-mode fiber. Delivery was fast too.

59 Helpful vote Comments

O***e

Romania

Verified Purchase

5 .0

2025-05-27

We received the items quickly and are pleased with the price. Also, thank you for the great communication.

120 Helpful vote Comments

M***t

United States

Verified Purchase

5 .0

2025-05-16

First purchase a very pleasant experience

21 Helpful vote Comments

E***d

Finland

Verified Purchase

5 .0

2025-04-27

Outstanding industrial operating temperature range — ideal for our unconditioned remote cabinets!

38 Helpful vote Comments

A***d

Poland

Verified Purchase

5 .0

2025-03-09

Excellent single-mode SFP transceivers. We use them for interconnecting high-throughput SAN arrays over long-distance links. No frame losses or latency penalties. The physical latching mechanisms feel very heavy-duty.

41 Helpful vote Comments

U***e

Austria

Verified Purchase

4 .0

2025-02-05

Good EML laser stability and excellent distance coverage up to 40km on SMF. The delivery was a day later than estimated due to bad weather at the hub. If you need reliable, budget-friendly DWDM transceivers for campus fiber networking, these are great, just plan for logistics variance.

34 Helpful vote Comments

R***w

Romania

Verified Purchase

5 .0

2025-01-31

Overall I like the store and the customer service seems to be on point.

123 Helpful vote Comments

W***g

United States

Verified Purchase

5 .0

2025-01-03

Goods as advertised. Shipping great. Recommended!

52 Helpful vote Comments

A***r

Macao

Verified Purchase

5 .0

2024-10-24

Products delivered as expected. Arrived a day early. Completely satisfied.

53 Helpful vote Comments

R***s

Hong Kong

Verified Purchase

5 .0

2024-03-21

I am proud to e a customer of Fiberstore.

78 Helpful vote Comments

P***f

Russian Federation

Verified Purchase

5 .0

2024-03-13

This company supplied the item at a good price, good quality and very quickly.

97 Helpful vote Comments

h***k

United States

Verified Purchase

5 .0

2024-02-29

Quick and seamless, great experience.

36 Helpful vote Comments

S***a

France

Verified Purchase

5 .0

2024-02-24

Got friendly, quick and knowledgeable answers to my questions, quick shipping. Some of the best prices I've found. Product was exactly what I wanted.

90 Helpful vote Comments

M***n

Indonesia

Verified Purchase

5 .0

2024-01-24

The price is very attractive. The customer service is very nice.

51 Helpful vote Comments

B***n

Norway

Verified Purchase

5 .0

2024-01-20

I appreciated the large array of productions offered

92 Helpful vote Comments

O***z

Romania

Verified Purchase

4 .0

2024-01-14

After seeing so many good reviews I gave it a try and I was extremely satisfied with the service here. Fast and simple! I'd recommend l-p.com to my friends!

85 Helpful vote Comments

A***r

United Kingdom

Verified Purchase

5 .0

2023-09-04

Excellent service delivery on time and very Fast and accurate.

40 Helpful vote Comments

J***n

Hong Kong

Verified Purchase

5 .0