Work on lab PC

- many new automations
- scripts to record and save MPI and bias optimizations...

projects/Lab_2024/lab_modulator_tf_sweep.m

@@ -0,0 +1,68 @@
+% Initialize a structure to hold parameters
+params = struct;
+
+% Define the bias voltage range from 1.2V to 2.8V with 0.01V increments
+params.v_bias = 1.2:0.01:2.8;
+
+% Create a DataStorage object with the defined parameters
+wh = DataStorage(params);
+
+% Add a storage field for output power measurements
+wh.addStorage("p_out");
+
+% Display the total number of measurement loops to be executed
+disp(['Start Measurement of ', num2str(prod(wh.dim)), ' loops...']);
+
+% Initialize the Optical Attenuator (VOA) with specified settings
+voa = OptAtten(...
+    "active", [1, 0, 0, 0], ...   % Activate only the first channel
+    "value", [0, 0, 0, 0], ...    % Set attenuation values to 0 dB
+    "wavelength", [1310, 1310, 1310, 1310]); % Set the wavelength for each channel
+
+% Initialize the DC Power Supply with specified settings
+dcs = DC_supply(...
+    "active", [1, 1], ...          % Activate the first two channels
+    "voltage", [v_bias, 9]);       % Set initial voltages for channels
+
+% Set the VOA active channels and attenuation values
+voa.set('active', [1, 0, 0, 0], 'value', [0, 0, 0, 0]);
+
+% Loop over each bias voltage value to perform measurements
+for v_bias = wh.parameter.v_bias.values
+    try
+        % Try to retrieve existing output power measurement to avoid repetition
+        p_out = wh2.getStoValue('p_out', v_bias);
+        wh.addValueToStorage(p_out, 'p_out', v_bias);
+    catch
+        % If no existing measurement, proceed with the measurement
+        
+        %%%%% SET Voltages %%%%%%
+        % Update the DC supply voltage for the current bias voltage
+        dcs.set("voltage", [v_bias, 9]);
+        
+        %%%%% Measure VOA %%%%%%
+        % Read the current values from the VOA
+        voa.readvals();
+        
+        % Store the measured output power in the DataStorage object
+        wh.addValueToStorage(voa.power_state(1), 'p_out', v_bias);
+    end
+    
+    % Retrieve all stored output power measurements up to the current point
+    p_out = wh.getStoValue('p_out', wh.parameter.v_bias.values);
+    
+    % Plot the measured output power in dBm versus the negative bias voltage
+    figure(90);
+    plot(-wh.parameter.v_bias.values(1:numel(p_out)), p_out, 'DisplayName', 'Measured Output Power in dBm');
+    xlim([-max(params.v_bias), -min(params.v_bias)]); % Set x-axis limits
+    grid on; % Enable grid for better readability
+end
+
+% After completing the measurements, retrieve all output power data
+p_out = wh.getStoValue('p_out', wh.parameter.v_bias.values);
+
+% Plot the output power converted from dBm to linear scale (Watts)
+figure(91);
+plot(-wh.parameter.v_bias.values(1:numel(p_out)), db2pow(p_out), 'DisplayName', 'Measured Output Power in Watts');
+xlim([-max(params.v_bias), -min(params.v_bias)]); % Set x-axis limits
+grid on; % Enable grid for better readability