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The latest technology in fiber optic single mode cable is primarily centered around increasing the capacity and speed of data transmission.

Some of the recent advancements include:

1. Dense Wavelength Division Multiplexing (DWDM): This technology allows multiple data streams to be sent simultaneously over the same fiber optic cable, each one on a unique light wavelength. This greatly increases the capacity of a single cable.

2. Spatial Division Multiplexing (SDM): This technology involves the use of multiple cores or modes in a single fiber, effectively multiplying the cable's capacity.
   
3. Bend-Insensitive Fiber (BIF): This technology allows the cable to be bent without significant loss of signal, making it more flexible and easier to install in tight spaces.

4. Nano-engineered optical fibers: These are developed to improve the efficiency of data transmission and increase the capacity of the fibers.

5. Coherent Optical Communications: This technology uses advanced signal processing and modulation techniques to increase the capacity and reach of optical communications.

6. Quantum Key Distribution (QKD): This is a secure communication method that implements a cryptographic protocol involving components of quantum mechanics. It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages.

7. Polymer Optical Fiber (POF): This is a type of optical fiber which is made out of polymers. These types of fiber are more flexible and have a higher failure threshold compared to glass fibers.

These advancements are continually being developed and refined to increase the speed, efficiency, and reliability of fiber optic single mode cable technology.

What are the 5 components of DWDM?