Single Fiber Qsfp28 80km Lc Optical Module

 Now only one fiber can transmit 100G under distance 80km.

100G BIDI 80km.

why use this optical module?

(1) save one fiber rent.

(2) easy to use and connect to Huawei/Cisco/Juniper switch directly.

(3) If two fibers can expand capacity to 200G.

don't need to add dwdm equipment.

(4) under 80km and small fiber loss environment.

can transit directly.

(5) Save engineer's time for upgrading 10G to 100G network easily and quickly.

Suitable for data center internet connect.

If want more details, welcome to contact Ivy from HTF.

ivy@htfuture.com    +8618123672396

Why need Single Fiber DWDM Applications?

 Fiber optic networking used to require two fibers, one for transmitting and one forreceiving signals simultaneously. Single fiber solutions emerged as a way to reduce costs ofdark fiber solutions and optimize fiber. Rather than using two dedicated strands, a single fiber strand that carries a bi-directional signal is used.

For enterprises leasing dark fiber from providers, the operational savings are significant. The challenge is to maximize revenues while reducing their largest expenditure - monthly cost of the fiber link. Using single fiber reduces operational costs by 50%, making dark fiber an affordable solution. 

In DWDM, active and passive solutions for single fiber transmission range from 4 up to 8 400G wavelengths, with optional optical amplifiers. The single fiber solution seamlessly

integrates with any standards-based 10/25/100Gb Ethernet, 16/32G Fibre Channel, and OTU2/2e/4 client interfaces, and supports any mix of up to 400G services. 

Single fiber solutions are recommended for the following applications:

• Point-to-point, ring or linear add and drop topologies, where installing new fiber is difficult or expensive

• Enables splitting enterprise traffic over two different fibers as opposed to using the same fiber for the entire traffic

• Increase reliability to an existing dual fiber solution by using one fiber for transmitting and receiving, and one for protecting.

DWDM Single Fiber Solution

The single fiber solution is more efficient and economical for many applications and needs, and provides the same performance and throughput as the traditional dual fiber solution. It enables customers to utilize single fiber for both transmitting and receiving, significantly maximizing their investment and reducing costs such as monthly leasing, taxes, or laying additional fibers.

The solution is transparent to the client optical interface and suits 400G, 100G, 10G, and sub-10G with any client interface mix. It incorporates a single mux with 8 or 16 channels. Half of the mux is used for transmitting and half for receiving.

If you need single fiber soluiton, welcome to contact HTF team, HTF will help you design the suitable DWDM solution. Support single fiber or dual fiber.

www.htfuture.com   ivy@htfuture.com   +8618123672396

Where DWDM use?

DWDM is often used by telecommunications, cable and data centers as part of their optical transport network.

Carrier Transport Network

The carrier transport network is made up of several layers of aggregation called the access network, metro aggregation network, edge network and the core backbone network. DWDM is most often used in the metro aggregation network and the core backbone network.

DWDM in the metro aggregation network is used to combine data from several cities. As service providers bring more computing capabilities closer to their customers, DWDM is also flexible enough to meet their needs for higher bandwidth aggregation as they begin to converge more data into a single node to compute. The core backbone often deals with the high-speed switching of large amounts of data between their major central offices, which can span across several regions, states or even countries, which is also ideal for using DWDM.

If need more information, welcome to contact HTF. www.htfuture.com

What is BA, LA, PA in the DWDM System?

 Erbium doped fiber amplifiers (EDFA) are now the most preferred and widely used optical amplifier for long-haul fiber-optic communications.

Booster amplifier (BA), in-line amplifier (LA), and pre-amplifier (PA) are the three types of EDFAs used in DWDM optical transmissions. They are typically deployed in combinations and placed at different locations along the transmission line to ensure that the signal is transmitted to the receiver.

The booster amplifier works at the transmission side of the link, which is used to amplify the optical signal before it launches into the fiber link. It is characterized by high input power, high output power and medium optical gain.

The in-line amplifier operates in the middle of the optical link, which is designed for optical amplification between two network nodes. It features low to medium input power, high output power, high optical gain, and low noise figure.

The pre-amplifier is placed at the receiving end of the optical link and is used to compensate for the losses of the demultiplexer near the optical receiver. It is characterized by medium to low input power, medium output power, and medium Gain.

What is OLP?

 What is OLP?

#OLP #DWDM #Datacenter #Protection #HTF
For example, you want to transmission 100G from Site A to site B.
There are 2 routings, you only choose routing 1, If the optical cable is broken, the transmission is interrupted.

You choose 2 routings, add OLP,  Routing 1 is primary link , and routing 2 is secondary link, If the optical cable is broken, the transmission will automatically jump from the primary link to the secondary link. Ensure uninterrupted business

Add OLP, need double routing. If you don't have redundent routing, suggestion not add OLP.

Optical Transceiver 1310nm fail to transmiss on G.655 optical fiber

 Have you ever encountered the problem that the link cannot be up when the 1310nm optical module is transmitted on G.655 optical fiber? I encountered this kind of problem recently, and now I want to share it with you.

Failure symptom

Module： 100G QSFP28 1310nm 80km optical transceiver

Switch： Cisco NCS540

Optical fiber type:  G.655, distance 50km

Failure symptom:  Transmission link cannot go up.

Analysis:

1.Change another switch, the link continues flap

2.Use G.652 optical fiber test in lab, Link works ok. Optical module Tx power and Rx power are in spec. That means optical transceivers performance are ok.

3.DWDM optical modules work well on G.655 link，that means G.655 link no break.   

4.Deduce：The optical module wavelength and fiber type don’t match

Root Cause:

Optical modules with a working wavelength of 1310nm cannot use G.655 optical fiber for long-distance transmission, G.655 Optical cable cutoff wavelength ≤ 1480nm, work window is C band and L band (1530nm~1625nm) , which means if wavelength smaller than 1480nm，cannot use on  G.655 

Summary:

1. G.655 optical fiber cannot transmit 1310 nm signals because the cut-off wavelength of G.655 optical fiber is 1480 nm.

2. If the input power and receive power are normal but the link cannot be up, it is usually because the optical module type does not match the fiber type.

What are the speed and modulation formats used by 800G OSFP/QSFP-DD modules?

all 800G modules make use of 8x electrical lanes in both directions, comprising 8 transmit lanes and 8 receive lanes. Each lane operates at a data rate of 100G PAM4, resulting in a total module bandwidth of 800Gb/s. Additionally, the optical output of all 800G transceivers comprises 8 optical waves, with each wave modulated at 100G PAM4 per lane.

If want to know more and buy this product, welcome to contact Ivy from HTF, ivy&htfuture.com

HTF can help you expand the network capacity by DWDM solution.  

HTF can help you design coherent 400G/200G/100G DWDM/OTN solution, DWDM Single lamda support 100G/200G/400G Dual fiber/Single fiber Ultra long distance transmission. Expand your network capacity and DCI network easily.