1 files changed, 89 insertions, 0 deletions
diff --git a/src/devices/detector.h b/src/devices/detector.h
new file mode 100644
index 0000000..d2e5e65
--- /dev/null
+++ b/src/devices/detector.h
@@ -0,0 +1,89 @@
+#pragma once
+
+#include <systemc.h>
+#include <fstream>
+#include <random>
+
+#include <optical_output_port.h>
+#include <optical_signal.h>
+#include "specs.h"
+#include "spx_module.h"
+
+// TODO: rename to photodetector
+class Detector : public spx_module {
+public:
+    // Ports
+    spx::oa_port_in_type p_in;
+    spx::ea_port_out_type p_readout; // TODO: divide into cathode and anode
+    double m_cur_readout;
+    double m_cur_readout_no_interf;
+
+    // Input memory for multi-wavelength purposes
+    std::map<uint32_t,OpticalSignal::field_type> m_memory_in;
+
+    // Detector enable signal
+    spx::ed_signal_type enable;
+
+    // Member variables
+    double m_responsivity_A_W;
+    double m_darkCurrent_A;
+    double m_opFreq_Hz;
+    double m_temp_K;
+    double m_equivR_Ohm;
+    double m_iTIA; // A/sqrt(Hz)
+    bool m_noiseBypass;
+    double m_sampling_time;
+
+    // if each photodiode has an independent RNG device
+    std::default_random_engine m_rngGen;
+    std::normal_distribution<double> m_rngDist;
+
+    sc_event m_event_manual_trigger;
+
+    // Init all parameters
+    void init();
+
+    // Function that generates the noise applied to the output of this module
+    double noise_gen(const double &noiseless_readout);
+    double wavelength_dependent_responsivity(const double &wavelength);
+
+    // Processes
+    void on_port_in_changed();
+    void on_time_tick();
+
+    virtual void trace(sc_trace_file *Tf) const
+    {
+        sc_trace(Tf, m_cur_readout, (string(name()) + ".readout").c_str());
+        sc_trace(Tf, m_cur_readout_no_interf, (string(name()) + ".readout_no_interference").c_str());
+    }
+
+    // Constructor
+    Detector(sc_module_name name,
+             double responsivity_A_W = 1,
+             double darkCurrent_A = 0, // 100e-12 is an OK value
+             bool noiseBypass = true,
+             double opFreq_Hz = 1e9,
+             double temp_K = 300,
+             double equivR_Ohm = 400,
+             double iTIA = 10e-12,
+             double sampling_time = 1e-12)
+        : spx_module(name)
+        , m_responsivity_A_W(responsivity_A_W)
+        , m_darkCurrent_A(darkCurrent_A)
+        , m_opFreq_Hz(opFreq_Hz)
+        , m_temp_K(temp_K)
+        , m_equivR_Ohm(equivR_Ohm)
+        , m_iTIA(iTIA)
+        , m_noiseBypass(noiseBypass)
+        , m_sampling_time(sampling_time)
+        , m_rngDist(0,1)
+    {
+        SC_HAS_PROCESS(Detector);
+        enable = sc_logic(0);
+
+        SC_THREAD(on_port_in_changed);
+        sensitive << p_in;
+
+        SC_THREAD(on_time_tick);
+    }
+};