Fiber Optics knowledge
- Maintained Methods of Fusion Splicer Parts
- How to Use the Fiber Optic Cleaver?
- What are Fixed Attenuators & Variable Attenuators?
- Deployable Fiber Optic Systems for Harsh Mining Environments
- Developing Miniature Fiber Optic Cable Has Become the Trend
- Fiber Optic Cleaning Procedures
- 6 Steps to Selecting a Fiber Optic Cable
- Signal Attenuation Introduction
- How Fiber Transmission Works?
SOPTO Special Topic
Except products belongs to Bargain Shop section, all products are warranted by SOPTO only to purchasers for resale or for use in business or original equipment manufacturer, against defects in workmanship or materials under normal use (consumables, normal tear and wear excluded) for one year after date of purchase from SOPTO, unless otherwise stated...
Defective products will be accepted for exchange, at our discretion, within 14 days from receipt. Buyer might be requested to return the defective products to SOPTO for verification or authorized service location, as SOPTO designated, shipping costs prepaid. .....
Fiber Optis can be used in so many fields:
Data Storage Equipment
Aerospace & Avionics
Data Transfer Tests
Oil & Gas, Imaging
Outside Plant,Central Office
Ship to Shore,Education
Unmanned Aerial Vehicles
Diagnostics & Troubleshooting
Premise Networks Carrier Networks
Independent Telecommunication Providers
- Fiber Optic Transceiver
- High Speed Cable
- Fiber Optical Cable
- Fiber Optical Patch Cords
- Splitter CWDM DWDM
- GEPON Solution
- FTTH Box ODF Closure
- PCI-E Network Card
- Network Cables
- Fiber Optical Adapter
- Fiber Optical Attenuator
- Fiber Media Converter
- PDH Multiplexers
- Protocol Converter
- Digital Video Multiplexer
- Fiber Optical Tools
Fiber Optics knowledge
How Fiber Transmission Works?
Light rays are modulated into digital pulses with a laser or LED and move along the core without penetrating the cladding. The light stays confined to the core because the cladding has a lower refractive index, which is the measure of a material’s ability to bend light.
This results in the phenomenon of total internal reflection (TIR), which happens when a propagating wave strikes a boundary between two mediums (in this case, the core and the cladding) at an angle larger than the fiber’s critical angle. If the refractive index is lower on the other side of the boundary (the cladding) and the incident angle is greater than the critical angle, the wave cannot pass through and is entirely reflected.
Total Internal Reflection (TIR)
The critical angle θc is determined by Snell’s Law, which states that “the ratio of the sines of the angles of incidence and refraction is equivalent to the reciprocal of the ratio of the indices of refraction”.
sinθ1 / sinθ2 = N2 / N1
Rearranging Snell’s Law, the angle of incidence can be calculated as:
sinθi = N2 / N1 * sinθt
To find the critical angle, we calculate the value for θi when θt = 90°, which means that sin θt = 1 (90° is the absolute maximum angle of transmission). Solving for θi, we arrive at the following equation:
θi = θt =arcsin(N2 /N1)
For example, consider a ray of light moving from water to air. The refractive indices of water and air are approximately 1.333 and 1, respectively, so calculating for the critical angle we get:
Θcrit = arcsin (N2 / N1) = arcsin (1.333 / 1) = 48.6o
Therefore, the angle of incidence must be greater than 48.6° in order for total internal reflection to occur in our example.
Light reflection in the water
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