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#pragma once
#include <systemc.h>
#include <spx_module.h>
#include <optical_output_port.h>
#include <optical_signal.h>
#include "specs.h"
#include "spx_module.h"
/** A 1x2 waveguide splitter module.
*
* This device copies any output to its two output, with power values defines by the
* split ratio and attenuation.
* */
class Splitter : public spx_module {
public:
// Ports
/** The optical input port. */
spx::oa_port_in_type p_in;
/** The first optical output port. */
spx::oa_port_out_type p_out1;
/** The second optical output port. */
spx::oa_port_out_type p_out2;
private:
// Timed ports writers
/** Timed writer to the first output port.
*
* @sa DelayedWriter
* */
OpticalOutputPort m_out1_writer;
/** Timed writer to the second output port.
*
* @sa DelayedWriter
* */
OpticalOutputPort m_out2_writer;
public:
// Member variables
/** The power transmission from input to branch 1, exclusive of losses
*
* The power transmission from input to branch 2 is (1 - m_split_ratio)
* */
double m_split_ratio;
/** The delay for an output to propagate to the outputs in ns.
*
* The delay is the same for both outputs.
* */
// static double m_delay_ns;
/** The attenuation of the signal in dB.
*
* The attenuation is applied before the split (although it does not really make a
* difference. */
double m_attenuation_dB;
// Processes
/** Main process of the module.
*
* It copies the input to both output, after attenuation and delay.
*
* **SystemC type:** thread
*
* **Sensitivity list:** p_in
* */
void on_port_in_changed();
// Constructor
/** Constructor for Splitter
*
* @param name name of the module
* @param split_ratio ratio of the light which goes to the first ouptut
* (pre-attenuation)
* */
Splitter(sc_module_name name, double split_ratio = 0.5, double attenuation_dB = 0)
: spx_module(name)
, m_out1_writer("out1_delayed_writer", p_out1)
, m_out2_writer("out2_delayed_writer", p_out2)
, m_split_ratio(split_ratio)
, m_attenuation_dB(attenuation_dB)
{
SC_HAS_PROCESS(Splitter);
SC_THREAD(on_port_in_changed);
sensitive << p_in;
}
};
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