FAQs

What are your prices?

Our prices will be great and competitive due to our strong production capability, even though the prices are subject to change depending on supply and other market factors. We will send you an updated price list after your company contact us for further information.

Do you have a minimum order quantity?

Actually not. we will quote based on your quantities. The more you order, the better price you will get. And if you need free samples, please contact us by email.

Can you supply the relevant documentation?

Of course, yes. We can provide you with related documents, such as Certificates of Analysis / Conformance; Insurance; Origin, and other export documents.

What is the average lead time?

According to your quantity and model in detail, we will offer you reasonable lead time. As usual,for samples, the lead time is about 7 days. For mass production, the lead time is 20-30 days after receiving the deposit payment.  Free free let us know if you have any special requirement.

What kinds of payment methods do you accept?

You can make the payment to our bank account, Western Union or PayPal:
30% deposit in advance, 70% balance against the copy of B/L.

What is the product warranty?

We warranty our materials and workmanship. Our commitment is to your satisfaction with our products. In warranty or not, it is the culture of our company to address and resolve all customer issues to everyone’s satisfaction

Do you guarantee safe and secure delivery of products?

Yes, we always use high quality export packaging. We also use specialized hazard packing for dangerous goods and validated cold storage shippers for temperature sensitive items. Specialist packaging and non-standard packing requirements may incur an additional charge.

How about the shipping fees?

The shipping cost depends on the way you choose to get the goods. Express is normally the most quickest but also most expensive way. By seafreight is the best solution for big amounts. Exactly freight rates we can only give you if we know the details of amount, weight and way. Please contact us for further information.

OM3 Vs OM4 Multimode fiber , What's the difference?

In fact, the difference between OM3 vs OM4 fiber is just in the construction of the fiber optical cable. The difference in the construction means that OM4 cable has better attenuation and can operate at higher bandwidth than OM3. What is the reason of this? For a fiber link to work, the light from the VCSEL transceiver much have enough power to reach the receiver at the other end. There are two performance values that can prevent this—optical attenuation and modal dispersion.

Attenuation is the reduction in power of the light signal as it is transmitted (dB). Attenuation is caused by losses in light through the passive components, such as cables, cable splices, and connectors. As mentioned above the connectors are the same so the performance difference in OM3 vs OM4  is in the loss (dB) in the cable. OM4 fiber causes lower losses due its construction. The maximum attenuation allowed by the standards is shown below. You can see that using OM4 will give you lower losses per meter of cable. The lower losses mean that you can have longer links or have more mated connectors in the link.

Maximum attenuation allowed at 850nm: OM3 <3.5 dB/Km; OM4 <3.0 dB/Km

Light is transmitted at different modes along the fiber. Due to the imperfections in the fiber, these modes arrive as slightly different times. As this difference increases you eventually get to a point where the information being transmitted cannot be decoded. This difference between the highest and lowest modes is known as the modal dispersion. The modal dispersion determines the modal bandwidth that the fiber can operate at and this is the difference between OM3 and OM4. The lower the modal dispersion, the higher the modal bandwidth and the greater the amount of information that can be transmitted. The modal bandwidth of OM3 and OM4 is shown below. The higher bandwidth available in OM4 means a smaller modal dispersion and thus allows the cable links to be longer or allows for higher losses through more mated connectors. This gives more options when looking at network design.

Minimum Fiber Cable Bandwidth at 850nm: OM3 2000 MHz·km; OM4 4700 MHz·km