What is Core Network, Metropolitan Area Network, and Access Network?
Optical Passive Components
by HYC
8M ago
The basic structure of communication network includes Backbone Network, Core Network, Metropolitan Area Network, and Access Network. The Access Network types of wireless access, and wired access. To be simply, Access network connects end-user devices to carriers provider. Wireless access is what we call mobile transmission, 4g, 5g. Fiber to the home(FTTH) is the wired access network. A bearer network is the collection of devices and underlying infrastructure used to transmit data from one location to another. The core network (also known as the “backbone network”) is the heart of a communica ..read more
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Mode Field Diameter Fiber Array for Silicon Photonics Modules
Optical Passive Components
by HYC
9M ago
With the rapid development and application of cloud computing and data cloud, the substantial increase in data center network traffic also places higher requirements on data center networks and optical interconnection technologies. The emergence of silicon photonics technology has solved how Internet cloud service providers can greatly increase the speed of optical modules while maintaining the same cost, power consumption and size. Compared with traditional technology, the advantages of silicon photonics technology are its low power consumption, high-speed, and compact structure. With its hig ..read more
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Parallel Optics and WDM Optics Subassemblies for High-speed Optical Transceivers
Optical Passive Components
by HYC
9M ago
The common optical modules are divided into short distance(<2km), middle distance(10~20km), long distance(>30km). According to the typical transmission distance, optical module types are divided into SR (100m), DR (500m), FR (2km), LR (10 km), ER (40 km), ZR (80 km). What do the SR, FR that means? SR, LR, ER are standard unified optical module structure packaging and related interfaces defined by IEEE, while DR and FR are defined by the MSA organization. SR stands for short reach; the SR optical modules are mostly used Multimode Parallel technology. PSM4(Parallel Single Mode 4 Channels) is th ..read more
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CWDM(Coarse Wavelength Division Multiplexing) VS DWDM(Dense Wavelength Division Multiplexing)
Optical Passive Components
by HYC
9M ago
WDM(Wavelength Division Multiplexing) technology offers a cost-effective solution to increase network capacity without deploying additional optical fiber in your existing fiber optic network. CWDM and DWDM are two main WDM technologies with different wavelength patterns, capabilities, costs, and applications. CWDM stands for Coarse Wavelength Division Multiplexing, and the term “Coarse” refers to the wavelength spacing between channels. CWDM has a wider channel spacing of 20nm, and it is standardized to have 18 different wavelength channels with a spacing of 20 nanometers (nm) starting at 1270 ..read more
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Why the fiber endface is usually polished at 8-degree angle?PC, UPC, APC
Optical Passive Components
by HYC
10M ago
First, let’s understand how optical fibers transmit signals. The structure diagram of fiber generally consists the core, cladding, and coating. The fiber core and cladding are made of glasses with different refractive indices. The core is where light travels, which made of high refractive index silica glass and is the only part of the cable that includes a rare-earth element. The cladding is the material that surrounds the core, which made of lower refractive index silica glass. When light hits the cladding, it bounces back into the core. Light is injected into the fiber at a specific incident ..read more
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What is optical splitter, PLC splitter, FBT splitter?
Optical Passive Components
by HYC
10M ago
What is optical splitter Optical fiber splitter is to split an optical fiber signal into two or more optical signal outputs by a determined ratio, which is an important device in access FTTH networks. For example, a 1×4 optical splitter distributes the optical signal in one optical fiber to four optical fibers in a certain proportion. Unlike the WDM (wavelength division multiplexer), the demultiplexer divides the optical signals of different wavelengths into corresponding wavelength channels, while the optical splitter divides the entire optical signal into multiple channels for transmission ..read more
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Functions and Applications of Optical Add-drop Multiplexer (OADM)
Optical Passive Components
by HYC
1y ago
Overview: What does optical add-drop multiplexer stand for Functions of OADM Types of OADM (FOADM, TOADM) Applications of OADM 1,What does optical add-drop multiplexer stand for OADM is Optical Add-Drop Multiplexer, which used in WDM systems for multiplexing and routing different channels of light into or out of a single mode fiber. Its main function is to selectively drop or add one or multiple wavelength channels without affecting the transmission of other wavelength channels. The OADM device is one of the key devices of the all-optical network. “Add” refers to the capability of the device ..read more
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Twenty Essential Knowledge of Optical Cable
Optical Passive Components
by HYC
1y ago
What is fiber optic cable? Structure of optical fiber cable Working wavelength of optical fiber Wavelength of minimum dispersion and minimum loss What is the dispersion of optical fiber? What are the causes of fiber attenuation? What does fiber optic bandwidth mean? What is insertion loss What is Return Loss? Fiber core diameter What is the mode field diameter (MFD) What is Numerical Aperture (NA) What is the cutoff wavelength Zero Dispersion Wavelength Dispersion-Shifted optical fibers (DSF) Non-zero dispersion-shifted fiber (NZDF) Types of optical fiber Main types of optical fiber used in o ..read more
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How to use WDM technology to expand fiber capacity?
Optical Passive Components
by HYC
1y ago
Overview: Expanding fiber capacity with WDM What’s Mux and Demux CWDM vs DWDM What does optical add-drop multiplexer stand for WDM bands WDM technology: TFF and AWG WDM-PON in access network WDM in 5G network Wavelength Division Multiplexing (WDM) is one of the most common ways of using wavelengths to increase bandwidth by multiplexing various optical carrier signals onto a single optical fiber. It combines a series of optical carrier signals with different wavelengths carrying various information and coupled to the same optical fiber for transmission at the transmitting end. At the receiving ..read more
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Michelson Interferometers Components for Signal Detection in 5000m Deep Sea
Optical Passive Components
by HYC
1y ago
With the gradual advancement of the national marine strategy, the deep-sea applications of optical fiber hydrophones have becoming more and more extensive with higher requirements of the reliability. Based on six basic technology platforms, HYC has launched a series of Michelson interferometers that can be used in deep sea hydrophones. The product line includes FRM (Faraday Rotating Mirror) and Coupler devices featuring ultra-miniaturized packing, ultra-high reliability. It is ideal for fiber optic interferometric sensor systems for deep-sea 5000m signal detection. Interferometric fiber sensor ..read more
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