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ADTEK Science | Optical Communication Course Summary
release time:2022-12-15
Author: Lu Bai
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02 Fundamentals of Optical Transmission and Optical Networks


I: The basic characteristics of laser.


1. high brightness 2. small divergence angle 3. monochromaticity 4. high coherence


Two: Explanation of terminology    


Wave / time / space / code / frequency division multiplexing


Wave division: the same space in time to run different wavelengths of light


Frequency division: the same wave division


Space division: the same time in a different space to run


Code division: different "codes" running in the same time space


Time division: different times in the same space to run different signals


Three: optical communication network advantages (the following chart)


Translated with www.DeepL.com/Translator (free version)

 

04 Fiber optic cable


I: Structure of optical fiber


Fiber core → cladding → coating layer


Second: the classification of optical fiber


By mode: single-mode multimode


By refractive index: reflection and gradient


Three: fiber optic connector types


FC, ST, SC, LC


MTP®MPO


Four: MTP®MPO type (as below)


I: The main optical passive components


1.Coupler 2.Splitter 3.Isolator 4.Circulator 5.WDM 6.Optical switch 7.WSS 8.Attenuator


Second: the competitiveness of passive components


1.Quality reputation 2.Low cost 3.New R&D 4.Multi-species management


III: Devices in optical fiber communication system (as below)


05 Optical Passive Devices


06 Optical Transceiver Module


I: Optical transceiver module design indicators


1. low power consumption 2. high speed 3. long distance 4. hot-swappable 5. miniaturization 6. intelligent


Second: the function and application of optical transceiver module


Function: Photoelectric signal conversion


Application: optical network and electrical network interfacing


Trend: optical network has been expanding, the intersection interface is expanding


Three: the packaging types of optical modules (as shown)


丨: Light-emitting chip types


1.VCSEL 2.FP laser 3.DFB laser 4.EML laser


Second: light receiving chip types


1.PIN photodiode 2.APD avalanche diode


Three: types of electrical chips for optical modules (as follows)


07 Optical communication basic materials and parts



08 New Technologies and Listed Companies


I: New concepts in optical communication industry

Silicon Light: Optimistic forecast of half of all optical modules in 2024


CPO: i.e. Co-Package Optics (with ASIC)


Coherent optical communication: changing the frequency, phase and amplitude of optical carriers


II: Listed Companies


1.Finisar


Finisar is the world's largest optical module company, with a more powerful product line of digital communication and a collection of all the latest technology solutions.


2. Suntrust


The fastest growing optical module company in the last decade.


3. Optical Communication


It covers all optical devices and vertically integrates various optical communication chip product lines.


4.Xinyisun


The fastest growing optical module company in the past five years. Seized the opportunity of 400G product line in the digital communication market.


5. New Feitong


Tunable laser product line from Emcore, acquired by Lumentum in 2021





Good new year




      The New Year is approaching, ADTEK's vacation time is January 21 to January 27, 2023, a total of seven days off, January 29 (the eighth day of the first month) to start work, Ai here in advance to wish you a happy New Year, wishing success!




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