1 files changed, 77 insertions, 0 deletions
diff --git a/ext/dsent/model/optical/RingFilter.cc b/ext/dsent/model/optical/RingFilter.cc
new file mode 100644
index 000000000..5f0bd5b40
--- /dev/null
+++ b/ext/dsent/model/optical/RingFilter.cc
@@ -0,0 +1,77 @@
+#include "model/optical/RingFilter.h"
+
+#include "model/optical_graph/OpticalWaveguide.h"
+#include "model/optical_graph/OpticalFilter.h"
+
+namespace DSENT
+{
+    RingFilter::RingFilter(const String& instance_name_, const TechModel* tech_model_)
+        : OpticalModel(instance_name_, tech_model_)
+    {
+        initParameters();
+        initProperties();
+    }
+
+    RingFilter::~RingFilter()
+    {}
+
+    void RingFilter::initParameters()
+    {
+        addParameterName("InStart");
+        addParameterName("InEnd");
+        addParameterName("DropStart");
+        addParameterName("DropEnd");
+        addParameterName("DropAll", "TRUE");
+        return;
+    }
+
+    void RingFilter::initProperties()
+    {
+        return;
+    }
+
+    void RingFilter::constructModel()
+    {
+        //TODO: Add tuning energy/ndd-power costs?
+    
+        // Create Area result
+        Result* area_result = new AtomicResult("Photonic");
+        addAreaResult(area_result);
+    
+        // Get parameters
+        WavelengthGroup in_wavelengths = makeWavelengthGroup(getParameter("InStart"), getParameter("InEnd"));
+        WavelengthGroup drop_wavelengths = makeWavelengthGroup(getParameter("DropStart"), getParameter("DropEnd"));
+        bool drop_all = getParameter("DropAll");
+        
+        // Create optical ports
+        createOpticalInputPort(     "In", in_wavelengths);
+        createOpticalOutputPort(    "Drop", drop_wavelengths);
+        createOpticalOutputPort(    "Out", in_wavelengths);
+        // Create the filter
+        createFilter(       "RingFilter",   in_wavelengths, drop_all, drop_wavelengths);
+        OpticalFilter* ring_filter = getFilter("RingFilter");
+        // Connect the filter
+        getWaveguide("In")->addDownstreamNode(ring_filter);
+        ring_filter->addDownstreamNode(getWaveguide("Out"));
+        ring_filter->setDropPort(getWaveguide("Drop"));                
+    }
+    
+    void RingFilter::updateModel()
+    {
+        //TODO: Get numbers from tech model;
+        double ring_area = 200e-12;
+        double thru_loss = 1e-4;
+        double drop_loss = 1.0;
+        // Get parameters
+        WavelengthGroup drop_wavelengths = makeWavelengthGroup(getParameter("DropStart"), getParameter("DropEnd"));
+        int number_wavelengths = drop_wavelengths.second - drop_wavelengths.first + 1;
+        // Update losses
+        OpticalFilter* ring_filter = getFilter("RingFilter");
+        ring_filter->setLoss(thru_loss * number_wavelengths);
+        ring_filter->setDropLoss(drop_loss + thru_loss * number_wavelengths);
+        // Update area
+        getAreaResult("Photonic")->setValue(ring_area * (number_wavelengths));        
+    }
+    
+} // namespace DSENT
+