better np hash, Fiber always array, resonance

testing/test_resonance.py

@@ -0,0 +1,22 @@
+import numpy as np
+import scgenerator as sc
+import matplotlib.pyplot as plt
+from pathlib import Path
+
+
+def main():
+    capillary_thickness = 1.4e-6
+    wl = np.linspace(200e-9, 2000e-9, 500)
+    n_gas_2 = sc.materials.n_gas_2(wl, "air", 3e5, 300, True)
+    resonances = []
+    for i in range(5):
+        t = sc.fiber.resonance_thickness(wl, i, n_gas_2, 40e-6)
+        resonances += list(1e9 * sc.math.all_zeros(wl, t - capillary_thickness))
+        plt.plot(1e9 * wl, 1e6 * t)
+    plt.xlabel("nm")
+    plt.ylabel("μm")
+    plt.show()
+
+
+if __name__ == "__main__":
+    main()