optics
Class GaussianBeam

java.lang.Object
  optics.Optics
      optics.Ray
          optics.ParaxialRay
              optics.GaussianBeam

public class GaussianBeam
extends ParaxialRay

Class to implement a Gaussian Beam that can be traced using using the ParaxialMatrix and ParaxialGroup classes. The Gaussian beam extends a ParaxialRay by adding the complex beam parameter.

Field Summary

protected optics.math.Complex

beam The complex beam parameter (actually 1/q).

Fields inherited from class optics.ParaxialRay

angle, height, plane

Fields inherited from class optics.Ray

intensity, monitor, waveLength

Fields inherited from class optics.Optics

DEFAULT_WAVELENGTH, errorStream, fmt, MICRONS, version

Constructor Summary

GaussianBeam(double lambda, double waist)
Constrctor to form a GuassianBeam at the origin, with height 0, angle 0 in plane 0, with specifed wavelength at beam waist

GaussianBeam(double h, double a, double p, double lambda, double waist)
Constructor to form a GuassianBeam with specifed beam waist.

Method Summary

double	getAlpha() Method to get Alpha parameter.
optics.math.Complex	getBeamParameter() Method the complex beam parameter q.
double	getBeamRadius() Method to get the current beam radius.
double	getBeamWaist() Method to get the beam waist of the current GaussianBeam.
double	getBeamWaistLocation() Method to get the beam waist location in global coordinates.
double	getCurvature() Method to get the curvature of the beam wavefront
double	getDivergenceAngle() Method to get the farfield divergence angle of the beam in radians.
boolean	mult(ParaxialMatrix p) Method to multiply the current GuassianBeam by a ParaxialMatrix.
void	setBeamParameter(optics.math.Complex q) Method to set the complex beam parameter
String	toString() Method to get the GaussianBeam information in a String

Methods inherited from class optics.ParaxialRay

clone, crosses, crossesZero, edit, getAngle, getAngleInDegrees, getHeight, getPlane, getPosition, heightInPlane, isInvalid, main, pointInPlane, propagate, propagateThrough, propagateThrough, propagateTo, setAngle, setAngle, setAngleInDegrees, setHeight, setInvalid, setPlane

Methods inherited from class optics.Ray

addMonitor, clearMonitor, getIntensity, getMonitor, getWaveLength, isValid, monitorUpdate, setIntensity, setWaveLength

Methods inherited from class optics.Optics

getDefaultWaveLength, getErrorStream, getFormatString, getName, getStaticName, getVersion, printError, setDefaultWaveLength, setErrorStream, setFormatString, setMicrons

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

beam

protected optics.math.Complex beam

The complex beam parameter (actually 1/q).

Constructor Detail

GaussianBeam

public GaussianBeam(double h,
                    double a,
                    double p,
                    double lambda,
                    double waist)

Constructor to form a GuassianBeam with specifed beam waist.

Parameters:

h - height from optical axis

a - angle with respect to optical axis

p - the plane

lambda - wavelength in microms

waist - the beam waist.

GaussianBeam

public GaussianBeam(double lambda,
                    double waist)

Constrctor to form a GuassianBeam at the origin, with height 0, angle 0 in plane 0, with specifed wavelength at beam waist

Parameters:

lambda - wavelength in microms

waist - beam waist in mm

Method Detail

getBeamParameter

public optics.math.Complex getBeamParameter()

Method the complex beam parameter q.

Returns:

Complex the Complex beam parameter.

setBeamParameter

public void setBeamParameter(optics.math.Complex q)

Method to set the complex beam parameter

Parameters:

q - the Complex beam parameter.

getCurvature

public double getCurvature()

Method to get the curvature of the beam wavefront

Returns:

double the wavefront curvature.

getAlpha

public double getAlpha()

Method to get Alpha parameter.

Returns:

double the alpha paramater

getBeamRadius

public double getBeamRadius()

Method to get the current beam radius.

Returns:

double the

toString

public String toString()

Method to get the GaussianBeam information in a String

Overrides:

toString in class ParaxialRay

Returns:

String the information as a String.

getBeamWaist

public double getBeamWaist()

Method to get the beam waist of the current GaussianBeam. Note this is the minumum possible beam waste and not the current radius.

Returns:

double the beam waist

getDivergenceAngle

public double getDivergenceAngle()

Method to get the farfield divergence angle of the beam in radians.

Returns:

double the divergence angle

getBeamWaistLocation

public double getBeamWaistLocation()

Method to get the beam waist location in global coordinates.

Returns:

double location of the beam waist.

mult

public boolean mult(ParaxialMatrix p)

Method to multiply the current GuassianBeam by a ParaxialMatrix.

Overrides:

mult in class ParaxialRay

Parameters:

p - the ParaxialMatrix

Returns:

boolean true if sucessful, false if there is a NaN.