PhotoCAD User Manual
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**PhotoCAD** is written in Python, a language widely used in the photonics industry, and the algorithms used to generate the layout are carefully optimized and researched by the developers, giving it a unique advantage over similar tools at home and abroad, such as no distortion or tearing of the layout at any angle. **fnpcell** and **link** are the two main tools of **PhotoCAD**, which correspond to the parametric cell layout and circuit-level layout in photonics chip layout design.

For beginners who wants to create a PIC by themselves by using **PhotoCAD**, we recommend to look through the ``Guides`` section, and you can get a quick glimpse from creating PCells to building your own circuits.

There are also several applications created by **Latitudeds** in the ``EXAMPLES`` section, users could also browse the examples to get an imagination how can **PhotoCAD** realize your ideas.


.. toctree::
   :hidden:

   Introduction/index
   Installation/index
   QuickStart/quickstart
   gpdk_manual/index
   fnpcell_manual/index




.. toctree::
   :caption: Guides
   :hidden:

   CreatePcell/index
   gpdk/QuickCreatePDK
   Circuit_design/index
   post_simulation/index
   example_manual/useful_routing
   Tutorials/Quickstart







.. toctree::
   :caption: Examples
   :hidden:

   PICircuits/PICircuits
   example_manual/triangle_mzi.py
   example_manual/example_demultiplexer2.py
   example_manual/example_cmz
   jupyter_notebook/index





.. toctree::
   :caption: Support and Changelog
   :hidden:

   fnpcell/index
   Release_notes/index
   Frequent_question/index
   AboutUS