Angle of obliqueness in optical fiber?

The angle of obliqueness in optical fiber refers to the angle at which light enters the core of the fiber relative to the normal (perpendicular) to the fiber's surface. This angle is crucial for total internal reflection, which allows light to be guided along the fiber. If the angle exceeds the critical angle for the core-cladding interface, light will refract out of the fiber instead of being guided, leading to signal loss. Maintaining the appropriate angle of obliqueness is essential for optimal fiber performance and signal integrity.