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diff --git a/src/devices/splitter.h b/src/devices/splitter.h
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+++ b/src/devices/splitter.h
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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;
+    }
+};