Acceptance Angle & Numerical Aperture NA (Basics, Definition, Derivation & Formula) Explained
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- Опубликовано: 17 сен 2024
- Acceptance Angle and Numerical Aperture NA is covered with the following outlines.
0. Acceptance Angle
1. Numerical Aperture
2. Acceptance Angle basics
3. Numerical Aperture basics
4. Acceptance Angle definition
5. Numerical Aperture definition
6. Acceptance Angle derivation
7. Numerical Aperture derivation
8. Acceptance Angle formula
9. Numerical Aperture formula
10. Formula of Acceptance Angle
11. Formula of Numerical Aperture
12. Formula of critical angle
Chapter-wise detailed Syllabus of the Optical Fiber Communication Course is as follows:
Chapter-1 Introduction to Optical Communication System: • Introduction to Optica...
Historical development of optical fiber communication (1G, 2G, 3G, 4G & 5G), Need of fiber optic communication system, Comparison of fiber optic communication system with copper wire communication system, Block diagram and working of fiber optic communication system.
Chapter-2 Optical Fiber: • Optical Fiber
Basics & structure of optical fibers, comparison of step index optical fiber and graded index optical fiber, single mode optical fiber and multi mode optical fiber, Comparison of Multimode step index fiber and Multimode graded index fiber, Refractive index of fiber, Refraction and Reflection of ray, Total internal reflection & critical angle, Snell's Law, Optical Fiber mode theory, Acceptance angle and Numerical Aperture, Normalized frequency, Relationship in between a number of modes and normalized frequency, acceptance angle & critical angle, Ray Optics representation.
Chapter-3 Optical Fiber Fabrication: • Fiber Fabrication
Optical Fiber Fabrication, OVPO, VAD, MCVD, PCVD, Photonic Crystal Fiber PCF, Double Crucible Method, Fiber Materials.
Chapter-4 Transmission Characteristics of Optical Fiber: • Transmission Character...
Windows and spectral bands, Digital Transmission Hierarchy, Phase velocity and Group velocity in optical fiber, History of Attenuation in optical communication, Attenuation of signal, Material Absorption in optical fiber cable, Fiber Bending Losses, Scattering Losses in Optical fiber cable, Dispersion Losses in Optical fiber.
Chapter-5 Optical Sources: • Optical sources:LED an...
LED - Light Emitting Diode, Parameters of LED (Characteristics of LED, Quantum Efficiency of LED, Protection of LED, Effect of temperature & Irradiance of LED), LED Structure, Planar LED, Surface Emitting LED, Edge Emitting LED, Examples on LED, Comparison of LED and LASER, LASER, Mode Hopping of LASER, Frequency Chirps of LASER, Fabry Parot LASER, Distributed feedback LASER, Power Launched by LED in Step index Fiber, Power Launched by LED in Graded Index Fiber.
Chapter-6 Optical Connector: • Optical Connector
Lensing schemes of optical fiber, Fiber to fiber joint losses, Fiber Splicing, Optical fiber connectors, and Equilibrium Numerical Aperture.
Chapter-7 Optical Detector: • Optical Detector
Photo Diode, Figure of Merits of Photodiode (Quantum efficiency of Photodiode, Responsivity of Photodiode & Dark Current of Photo Diode), PIN Photodiode, Avalanche Photodiode, Comparison of PIN Photodiode & Avalanche Photodiode, Eye Diagram, Receiver Performance.
Chapter-8 Optical Link Budget: • Optical Link Budget
Point to point link of optical fiber communication system, Link power budget analysis of optical fiber system, Link power budget analysis, Rise time budget analysis.
Chapter-9 Optical Amplifier: • Optical Amplifier
Optical Amplifier, Semiconductor Optical Amplifier, EDFA - Erbium Doped Fiber Amplifier, Raman Amplifier.
Chapter-10 Optical Components: • Optical Components
Optical Couplers, Parameters of optical couplers (Optical splitting, Excess loss, Insertion loss & cross talk), Optical Isolator, Optical Circulator, OADM - Optical Add Drop Multiplexer.
Chapter-11 Optical Network/ Optical Fiber Systems: • Optical Network / Opti...
WDM, DWDM, SONET/SDH.
Chapter-12 Optical Measurements: • Optical Measurement
OTDR, Dispersion Measurement, Eye Diagram.
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You are awesome 😎 I understood it in first time
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Bhaiya class 10 wala bhi easy samajh sakta hai?? Aap kaun se class mein hain??
Excellent level of teaching....easily understood ....this topic.....🥰...Tqsm for this video...sir really helpful....👌👌👌
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Hi
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Bhot achhe se explain kiya hai .Mai college wali ppt chhod ke apki video se sikhaa.Very good and thank you.As a gift I am subscribing !!!
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Sir thank you very much for a easy understanding lecture. I got it crystal clear. Thanks for the support via your video
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thanks sir every concept is now crystal clear.
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Thank you so much, your teaching style is really relaxing, really enjoyed this video
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Well explanation thank you sir❤
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Super sir we can easily understand this complex derivations❤
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Good strategy of explanation sir.
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why you had taken phie = phie c in derivation of acceptance angle , because for TIR to be happen Phie must be greater than the critical angle ,not that much large but it need to be greater. And Nice lecture.
Very nicely explained 👏
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@@EngineeringFunda sure sir..!
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Hii sir your videos are very helpful nd well explained... I learned all microwave and radar from your videos... Thank you sir...
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1. A light wave is travelling in a semiconductor medium (GaAs) of refractive
index 3.6.It is incident on a different semiconductor medium (AlGaAs) of
refractive index 3.4 & angle of incidence is 80○. Calculate numerical
aperture & acceptance angle. Will it result in total internal reflection?
could you please tell me this question for answer sir
Did you ever get the answer for this?
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thanks sir ,
its very helpfull to us....
U are really genious
Very clear sir.. thank you so much
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Thank you sir ji 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
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Awesome explanation 👍
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amazing explanation😇
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Amazing teaching
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Thank you so much sir for my help ❤️
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Thank you sir, u r explanation is clear and helpful
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Tq so much sir
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thank you so much
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Thank you so much sir.
Your positive comments motivates me.
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Love from you guys means a lot to me.
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thank u too much
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Thanks sir ❤❤
Your positive comments motivates me.
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TQ Sir 🥳
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@@EngineeringFunda You are helping So many students Sir, It Will Be Return To you In A better way sir 😊
Thankyou Sir 👍💖
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@16:20, Why in index difference (delta)N=n1-n2 but in relative refractive index (delta)N1=n1-n2 and so N1 is coming out of underroot? So messed up....just hate this subject, hate this branch, hate you, hate my life.
Relative refractive index are calculated with respect to separate medium, and N1 is coming out of underfoot because if you multiply these to term (2n1)(delta n1) then you will find n1^2 and root cancels square so you get n1 only.
Index difference is nothing but the difference between refractive indices of the two medium under consideration and is denoted by (delta n = n1 - n2).
Relative refractive index is something different. It is as an index of one medium in relation to the other medium, denoted by (delta = (n1 - n2)/n1).
Note very carefully here in the first case "delta n" is a single variable means delta and n are not separate for algebraic calculation, they are treated as just one variable.
In second case delta is a separate variable and n1 and n2 are also separate variables, so here we have three separate variables, so (delta n1 here actually is delta * n1) that it is the multiplication of two algebraic variables, hence it is coming out of the square root.
Hope you understood !
😟why u hate to all cool down aakash
@@meyun4699 Just cleared this subject, this semester, and this undergraduate course somehow.😅
@@aakashgupta7211 what are you doing diploma Or btech
Sir, thanks a lot. Can you please answer my query?
What if (N1)² - (N2)² is greater than 0? As values of N1 and N2 can be controlled by us, this can take place.
If this happens, then the value of sin theta will exceed 1, which is not possible. So, can you please explain this restriction.
It is not simple question, there are many tradeoff that will make system complicated.
🙏🙏 Ok, thanks a lot, sir. It would have been better if you could explain more. Anyways, thank you for replying.❤️
It's not n1 square minus n2 square. It has got root over it. So its value is never going to be more than 1. Moreover n1 will always be greater than n2 otherwise TIR will not take place.
@@Manus-hh1hd Values of n1 and n2 can be controlled by us. So, given some values, it is possible to make n1² - n2² greater than 0.
@@sarveshchandak yes can be
Awsm
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I have one question that in your previous videos you consider n2 as core and in this you consider n1 as core does this make any difference or same . For ofc n2>n1 , is this applicable for same.
refractive index of core is always greater then cladding refractive index.
@@EngineeringFunda thanks
Yes it makes huge difference correct notation is for core n1 and for cladding n2
Sir isme acceptance angle ki eqn kahan hai
Thank you sir ji
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Very useful sir
in this video as the signal is going from air medium to some medium i.e.core as it moves from rarer to denser but according to snell's law when light is going from rarer to denser it bend towards normal but how did it go away from normal.
please clear my doubt @engineeringfunda
Angle of refraction does it. As per snels law.
@@EngineeringFunda my point is
Air is a rarer medium in between core of glass or plastic. But in diagram as you explain when light goes from rarer to denser it bend towards normal but in diagram you show that it moves away from normal.
Thats what i don't understand.
Please explain that.
Yes, as light passes from a less dense to denser medium, the light bends towards the normal. This is shown in the purple and orange rays in the video; if you were to draw a line following the incident ray down inside the core, you will find that they bend towards the normal.
Maybe you may have the misunderstanding that "the bigger the incident angle, the smaller the refraction angle". This is not true, you may give arbitrary values of n1 and n2 and calculate the refraction angle using snells law.
Hope this helps :).
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Hitesh Dholakiya
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Sir, when light travel from rarer to denser after refraction light bend towards normal, but in this case light travel from air to core medium light bend away from normal, how sir
thank u
Sir which pens you have used in this.
Mitsubishi Ballpoint Pen
Thnku sir
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For all the classes before you took n2 as refractive index of core but in this lecture you consider?n1 for core?? Isn’t that too confusing and controversial???
There is nothing about n2 and n1, only you should consider refractive index of cladding should be greater compared core index.
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When n1 is approximately equal to n2 then n1-n2 bhi to zero ho jaega sir to n1+n2= 2n1 hone se bhi NA zero kyu nhi??
Sir I want to understand numerical aperture in the practical way
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Bhai koi international audience reach nahi hoti hindi use kyo nahi karte itne acche notes hai par hindi ke alawa itna accha nahi samajta
At 11:38 how can we replace sin fir by sin fic value...??
17:05 HOW TO TAKE n1 out of root. its 2n1 inside
See it properly dear, there is root(n1◇ (2n1)) that is n1 root(2◇)
What is meant by n1 n2 sir
Sir I have one doubt please clarify sir it is sin theta c= n2/n1 , how it sir
Same doubt
Can you send me there notes plz....
You can download it from my android application engineering funda
@@EngineeringFundathanks sir
What is the reason behind considering acceptance cone? Why don't we consider acceptance cylinder or semicircle?
Is there any specific meaning?
Sir please itne advertisement beech me mat daliye kyonki padhne me disturb hota hai...
plz explain in hindi
Too much ads in your video
*You should give atleast reply on doubt comments... One dislike, just coj of that attitude. If you reply, I'll change dislike to like* 😤😤😤😒
What is the difference between Relative Refractive Index & Index Variation ???
At 15:18 , how you considered n1~ n2. If it's approx equal, then N.A. should be zero, coj (n1 -n2)= 0
Please reply me and others who have Doubt
Index variation is different of n1 and n2.
Relative Refractive index is index variation/ Refractive index
@@EngineeringFunda ... I've noted.
We know, n1>> n2, then how, n1 approx equal to n2. If we put in (n1-n2) , whole N.A. will be zero.
Also, @17:02 ...how that n1 came out of the root??
@@Pranjal90 arrey bhai, n1-n2 is not zero because that is delta(very very small value like 0.000001 which is equivalent to zero).
Also, answer to your next ques.:- it is NA=sqrt root(delta×n1×2×n1)= (n1) sqrt root(2×delta)
.
Hope it helps!
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Thank you sir ❤❤
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Thank you sir...
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Thank you sir
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thank you so much sir
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