.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/basic/plot_neff_tapered_fiber.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_gallery_basic_plot_neff_tapered_fiber.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_basic_plot_neff_tapered_fiber.py:


Effective index for tapered multi-mode fiber
============================================

.. GENERATED FROM PYTHON SOURCE LINES 7-9

Imports
~~~~~~~

.. GENERATED FROM PYTHON SOURCE LINES 9-15

.. code-block:: Python

    import numpy
    from PyFiberModes.fiber import Fiber
    from PyFiberModes import LP01, LP11, LP21, LP02
    import matplotlib.pyplot as plt









.. GENERATED FROM PYTHON SOURCE LINES 16-17

Computing the analytical values using FiberModes solver.

.. GENERATED FROM PYTHON SOURCE LINES 17-31

.. code-block:: Python

    def get_mode_beta(fiber, mode_list: list, itr_list: list) -> dict:
        data_dict = {}
        for mode in mode_list:
            data_list = []
            for j, itr in enumerate(itr_list):
                _fiber = fiber.scale(factor=itr)
                data = _fiber.get_effective_index(mode=mode)
                data_list.append(data)

            data_dict[mode.__repr__()] = numpy.asarray(data_list)

        return data_dict









.. GENERATED FROM PYTHON SOURCE LINES 32-33

Constructing fiber

.. GENERATED FROM PYTHON SOURCE LINES 33-46

.. code-block:: Python

    fiber = Fiber(wavelength=1550e-9)
    fiber.add_layer(name='core', radius=20e-6, index=1.4494)
    fiber.add_layer(name='clad', radius=62.5e-6, index=1.4444)
    fiber.initialize_layers()

    itr_list = numpy.linspace(1, 0.1, 50)

    data_dict = get_mode_beta(
        fiber=fiber,
        mode_list=[LP01, LP11, LP21, LP02],
        itr_list=itr_list
    )








.. GENERATED FROM PYTHON SOURCE LINES 47-48

Preparing the figure

.. GENERATED FROM PYTHON SOURCE LINES 48-68

.. code-block:: Python

    figure, ax = plt.subplots(1, 1)

    ax.set(
        title='Mode fields for vectorial mode if x-direction',
        xlabel='Inverse taper ratio',
        ylabel='Effective index'
    )

    for mode, data in data_dict.items():
        ax.plot(
            itr_list, data,
            label=mode,
            linestyle='-',
            linewidth=2
        )


    plt.show()

    # -



.. image-sg:: /gallery/basic/images/sphx_glr_plot_neff_tapered_fiber_001.png
   :alt: Mode fields for vectorial mode if x-direction
   :srcset: /gallery/basic/images/sphx_glr_plot_neff_tapered_fiber_001.png
   :class: sphx-glr-single-img






.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.393 seconds)


.. _sphx_glr_download_gallery_basic_plot_neff_tapered_fiber.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_neff_tapered_fiber.ipynb <plot_neff_tapered_fiber.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_neff_tapered_fiber.py <plot_neff_tapered_fiber.py>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_