PBS_1xN_v1 Class Reference

Polarizing beam splitter. More...

Inherits unit.

Public Member Functions
function	PBS_1xN_v1 (in param)
	Class constructor. More...
function	traverse (in obj, in in)
	Main 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	orient_sig (in Ein, in v, in ER)
	Orient signal polarization. More...

Public Attributes
Property	bases
	Matrix of input SOPs, specified in Jones space. Should be properly normalized.
Property	align_in
	(optional) input state of polarization (Jones). Allows user to pass input signal through a polarizer before the PBS. This is useful for the local oscillator in a coherent receiver, for example.
Property	ER
	Extinction ratio (dB)
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

Polarizing beam splitter.

This block takes a single input and splits it into an arbitrary number of outputs (N), according to the set of specified state of polarization vectors. The input should be single-mode (with two orthogonal polarizations).

Observations:

Fundamentally, the only kind of PBS that can be lossless is one that splits a signal into two orthogonal polarizations. This particular implementation allows the user to specify non-orthogonal polarizations, and if this is done, it will NOT calculate the loss associated with that choice. This is because we expect that loss to be somewhat implementation-specific.

Example:

pb = PBS_Nx1_v1(struct('nOutputs', 2, 'bases', [1 0; 0 1]);

This will construct a standard (TE/TM) PBS.

See also

Polarizer_v1

PBC_Nx1_v1

BS_1xN_v1

Author

Molly Piels

Definition at line 34 of file PBS_1xN_v1.m.

Constructor & Destructor Documentation

function PBS_1xN_v1::PBS_1xN_v1

(

in

param

)

Class constructor.

Parameters

param.nOutputs	number of outputs
param.bases	set of bases in Jones space - single matrix
param.ER	extinction ratio (dB)
param.align_in	optional alignment for input polarizer (Jones vector)

Return values

obj	object of type PBS_Nx1_v1

Member Function Documentation

static function PBS_1xN_v1::orient_sig ( in  Ein, in  v, in  ER  )

static

Orient signal polarization.

If the input signal is unpolarized (waveform has one column only), this will assign it a polarization. Otherwise, it will behave as a polarizer - there may be power loss in this second case.

Parameters

Ein	input (signal_interface object)
v	output state of polarization (in Jones space)
ER	extinction ratio (dB)

Return values

Eout	output (signal_interface object)

function PBS_1xN_v1::traverse ( in  obj, in  in  )

virtual

Main function.

Each output is the input passed through the relevant polarizer.

Reimplemented from unit.

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

• library/optics/PBS_1xN_v1.m