Polarizer_v1 Class Reference

Polarizer model. More...

Inherits unit.

Public Member Functions
function	Polarizer_v1 (in param)
	Class constructor. More...
function	traverse (in obj, in in)
	Traverse function. More...
Public Member Functions inherited from unit
function	traverseNode (in obj)
	Set unique ID when creating a unit. More...
function	connectOutput (in obj, in uobj, in unitOutput, in nextUnitInput)
	Specify where signal should go next. More...
function	connectOutputs (in obj, in units, in destInputs)
	Specify where signal should go next. More...
function	writeInputBuffer (in obj, in sig, in inputId)
	write input buffer
function	horzcat (in varargin)
	horizontal concatenation
function	vertcat (in varargin)
	vertical concatenation
function	setparams (in obj, in params, in REQUIRED_PARAMS, in QUIET_PARAMS)
	set parameters More...
function	view (in obj)
	Show interactive GUI through unit_view-class.

Static Public Member Functions
static function	stokes2jones (in vin)
	Convert Stokes vector to Jones vector. More...

Public Attributes
Property	basis
	state of polarization vector (Jones)
Property	ER
	extinction ratio (dB)
Property	Type
	Jones or Stokes? {'Jones' | 'Stokes' | 'nDJones'}.
Property	nInputs
	Number of input arguments.
Property	nOutputs
	Number of output arguments.
Public Attributes inherited from unit
Property	inputBuffer
	Buffer for storing inputs as we traverse the graph.
Property	nextNodes
	Children nodes.
Property	destInputs
	Destination inputs in children.
Property	results
	For storing results.
Property	label
Property	draw
	enable/disable plotting
Property	nInputs
	Number of signals traverse expects.
Property	nOutputs
	Number of outputs traverse expects.

Detailed Description

Polarizer model.

Polarizer (TE/TM only, not multimode compatible) with finite extinction ratio. If the input is a single-polarization signal, it assigns a polarization. If the input is dual-pol, it acts like a normal polarizer.

The state of polarization can be specified in either Jones or Stokes space

For Stokes operation, we use the same sign convention as: Gordon [1] i.e. right-circular has sy = isx and in that case S3 = 1 Normalization is chosen so that right-circular is (0, 0, 1), horizontal (x) is (1, 0, 0), ...

Example

param.polarizer.basis = [1 1i];
param.polarizer.Type = 'Jones';
param.polarizer.ER = 20;
polarizer = Polarizer_v1(param.polarizer);

sigIn = createDummySignal_v1();

sigOut = polarizer.traverse(sigIn);

pabs(sigIn);
pabs(sigOut);

References [1] J. P. Gordon and H. Kogelnik, "PMD fundamentals: Polarization mode dispersion in optical fibers," Proc. Natl. Acad. Sci., vol. 97, no. 9, pp. 4541�4550, 2000

Author

Molly Piels

Version

1

Definition at line 44 of file Polarizer_v1.m.

Constructor & Destructor Documentation

function Polarizer_v1::Polarizer_v1

(

in

param

)

Class constructor.

Jones usage: basis is a 1x2 or 2x1 complex vector. Stokes usage: basis is a 1x4, 4x1, 1x3, or 3x1 real vector

Parameters

param.basis	State of polarization of output
param.Type	Specify whether Jones or Stokes
param.ER	Extinction ratio. [Default: inf]

Return values

obj	Polarizer_v1 object

Member Function Documentation

static function Polarizer_v1::stokes2jones ( in  vin )

static

Convert Stokes vector to Jones vector.

Convert Stokes vector to Jones vector. Note there is an inherent twofold ambiguity in this operation. This is resolved by somewhat arbitrarily assigning right-circular to 001

Parameters

vin	Stokes vector to convert

Return values

vout	Associated Jones vector

function Polarizer_v1::traverse ( in  obj, in  in  )

virtual

Traverse function.

Computes Jones matrix associated with polarizer, then either uses it or just assigns a polarization based on basis vector

Parameters

in	input signal (can have 1 or two columns)

Return values

out	output signal - has two columns
results	no results

Reimplemented from unit.

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The documentation for this class was generated from the following file:

• library/optics/Polarizer_v1.m