What is PAM4 technology

PAM4 — The High-Speed Signal Interconnection Technology of Next-Generation Data Center

What Is PAM4? PAM4 (4-Level Pulse Amplitude Modulation) is one of PAM modulation technologies that uses 4 different signal levels for signal transmission. Each symbol period can represent 2 bits of logic information (0, 1, 2, 3), that is, four levels per unit time. In the data center and short-distance optical fiber transmission, the modulation scheme of NRZ is still…

illuminated fiber bundle

Japanese Researchers Accomplish the First Step Towards Quantum Internet

Researchers Successfully Demonstrate Quantum Repeaters A team of researchers from Osaka University and Japanese telecommunication service provider, NTT reports a successful demonstration of quantum repeaters by adopting an all-photonic quantum repeater protocol. The achievement by Japanese researchers has far-reaching implications in optical transmission, especially in long-distance optical communications, enabling a quantum internet concept. The theory of an all-photonic quantum repeater…

part of earth illuminated with lights and stars showing words Journey towards 600G

Microchip and Acacia Test Interoperability of their Products

Microchip and Acacia Communications join hands together to offer industry’s first Flexible Rate Optical Transmission Up to 600G. The partners demonstrated the interworking of the Microchip’s DIGI-G5 Optical Transport Network Processor with Acacia’s AC1200 coherent module. The market is driving towards hyper-connected architectures together with the transition from 100G to data rates upto 600G. Microchip’s subsidiary company Microsemi Corporationa and…

DWDM Networks

DWDM Networks over Long Distance Transmission

With the ever-increasing need for higher bandwidth, DWDM technology has been one of the most favorable optical transport network (OTN) applications. In this post, we will reveal DWDM-based network solutions over various transmitting distances as well as some suggestions for the DWDM networks deployment. DWDM Networks Basics As usual, let’s review some basics of DWDM networks. In this part, we…

Passive CWDM vs DWDM: What’s the Difference? 9

Passive CWDM vs DWDM: What’s the Difference?

WDM (Wavelength Division Multiplexing) is a commonly used technology in optical communications. It is often deployed to join multiple wavelengths onto a single fiber. In the WDM system, there are two main types: Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM). Both CWDM and DWDM are available as active or passive systems. This article will focus on discussing the difference between…

Bi-Directional-DWDM-Operation

What Is DWDM?

Internet demand is always growing, especially the hugely popular video streaming services are increasing greatly. This provides a threat to the service provider. As the hottest topic in the telecommunication industry, DWDM offers unprecedented bandwidth which promises an effective solution to the challenges posed by the Internet growth. But what is DWDM, do you really know? What Is DWDM? DWDM wiki…

M-Net use DWDM solution to deliver 500Gbps over a single wavelength

Passive CWDM VS DWDM – Which to choose?

With current industry advancements trend that has equalized costs of transceivers, in a technical battle of CWDM vs DWDM, more advancements are in DWDM. Let’s compare passive CWDM vs DWDM from pure technical application viewpoint: CWDM vs DWDM – Channel Uniformity: As CWDM spectrum for 18 channels spans from 1260nm up to 1620nm compared to DWDM C-band 1530 – 1565…

Dense Wavelength division multiplexing

WDM Filter Technology

As an unprecedented opportunity to dramatically increase the bandwidth capacity, WDM(Wavelength Division Multiplexing) technology is an ideal solution to get more bandwidth and lower cost in nowadays telecommunications networks. WDM Filters can separate or combine optical signals carried on different wavelengths in a cost-effective manner. Splitters versus Filters One issue with WDM-PON(Passive Optical Network) is that there is no industry-accepted definition. WDM-PON is an…