Waveguide propagation

A guided calculation describes the transverse field through one or more modes. Begin with the effective-area description, then choose a guide family. Each family’s practical chapter links to its equations, spatial resolution choices and limitations. Coupling at a wall or along a taper is treated separately from the choice of modes. The spatial overview introduces these choices; the waveguide gallery shows them in full simulations.

Choosing and using a guide

• Mode averaging
• Generalised nonlinear Schrödinger propagation
• Waveguide modes
• Multimode capillaries: the coherent wall, tapers and gradients
• Solid-core fibres: the general modal route
• Supplying a waveguide
• Profiles along the fibre

Hollow guides and spatial resolution

• Capillary modes and dispersion
• Mode sets and transverse quadrature
• Radial nodes for expensive responses
• Antiresonant tube-lattice fibres
• Hollow rectangular waveguides
• Hollow planar waveguides
• Modes from tabulated data

Coupling and vector modes

• Coherent capillary walls
• Mode conversion in a capillary taper
• Vector boundary response
• Step-index fibres
• Radial graded-index fibres
• General modal propagation
• Vector fields, nonlinear projection and power
• Circular and coupled modal bases
• General modal guides that vary along the propagation
• Electric and magnetic mode fields
• Channel labels and modal tables