Shanghai FO-LINK Technology Co., Ltd

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Common Knowledge
1. What is PON? - Passive Optical Network (PON) is current uppermost optical access technology because of its large capacity, low cost and optical fiber consumption. PON is widely used in FTTH (Fiber To The Home) construction of the globe. A PON consists of an optical line terminal (OLT), splitters and several optical network units (ONUs). Base on the standards, it can be divided into EPON,GPON,WDM-PON,etc.
2. What is an optical passive component? -Optical passive component, such as coupler or filter, is a component that can accomplish certain optical function without any other light or electrical power. It working principle is based on physical and geometrical optical theory. Like laser transceiver, however, is called active device that found on photovoltaic energy conversion.
3. How to classify passive optical components?- According to different production process, passive optical components can be divided into fiber component and integrated component. According to different function, it van be divided into connector, attenuator, power splitter, wavelength splitter, isolator, switch, modulator, etc.
4. What are the main technical indicators to evaluate passive optical components?-The technical indicators include insert loss, return loss, polarization loss, and bandwidth, switch rate, modulate rate, extinction rate, etc. Different components have different requirements. But, low insert loss, high return loss, wide bandwidth are common for most optical passive components.
5. What is PLC?-Planar Lightwave Circuit (PLC), unlike fused biconic tapers (FBTs), can integrated multiple functions onto a single chip to significantly reduce size and cost. PLC technology applies to vary products: splitter, AWG, VOA, VMUX, ROADM, etc.
6. What are advantages of PLC over FBT?-Compared with FBT, PLC splitter has wider operating wavelength and temperature, small size, better uniformity, high reliability, etc. Nowadays, PLS splitter has already become the first choice of OLT and ONU connection for PON network.
7. What's the difference between broadband PLC splitter and three-band FBT splitter?-For the restrain of working theory and manufacturing techniques, FBT usually can work on three different operating bands. However, PLC splitter has a broader operating band (1260-1650nm) and low loss. So PLC spliiter is called “ broadband ".Currently, the standard operating bands for EPON & GPON are 1310, 1490 and 1550nm. For the next generation of PON such as WDM-PON will require more operating bands. Thus, PLC splitter can meet the needs and requirements for network update.

    1. Optoelectronic Industry and Technology Development Association (OITDA)
    2. Optoelectronics Industry Development Association (OIDA)

    1. European Conference and Exhibition on Optical Communication (ECOC
    2. Optical Fiber Communication Conference andExhibition (OFC)
    3. Fiber Optics Expo (FOE)
    4. OFC/NFOCE    
    5. China International Optoelectronic Exposition (CIOE)