Fixed mode rotation for non-colocated field components

tidy3d/components/mode.py

@@ -131,12 +131,12 @@ class ModeSpec(Tidy3dBaseModel):
         False,
         title="Use fields rotation when both bend and angle are defined",
         description="Defines how modes are computed when both a bend and an angle are defined. "
-        " If `False`, the two coordinate transformations are directly composed. If `True`, the "
-        "structures in the simulation are first rotated, to compute a mode solution at a reference"
-        "plane normal to the bend's azimuthal direction. Then, the fields are rotated to align with"
-        "the mode plane, using the `n_eff` calculated at the reference plane. The second option can"
-        "produce more accurate results, but more care must be taken for example in ensuring that the"
-        "original mode plane intersects the right geometries in the simulation with rotated structures.",
+        "If `False`, the two coordinate transformations are directly composed. "
+        "If `True`, the structures in the simulation are first rotated to compute a mode solution at "
+        "a reference plane normal to the bend's azimuthal direction. Then, the fields are rotated to align with "
+        "the mode plane, using the `n_eff` calculated at the reference plane. The second option can "
+        "produce more accurate results, but more care must be taken, for example, in ensuring that the "
+        "original mode plane intersects the correct geometries in the simulation with rotated structures.",
     )
 
     track_freq: Union[TrackFreq, None] = pd.Field(
@@ -172,17 +172,6 @@ def bend_radius_not_zero(cls, val, values):
             raise SetupError("The magnitude of 'bend_radius' must be larger than 0.")
         return val
 
-    @pd.validator("bend_angle_rotation", always=True)
-    @skip_if_fields_missing(["bend_radius", "bend_axis"])
-    def validate_bend_correction_requirements(cls, val, values):
-        """Ensure that both ``bend_axis`` and ``bend_radius`` are provided if ``bend_correction`` is enabled."""
-        if val is True:
-            if values.get("bend_axis") is None or values.get("bend_radius") is None:
-                raise SetupError(
-                    "'bend_correction' can only be enabled when both 'bend_axis' and 'bend_radius' are provided."
-                )
-        return val
-
     @pd.validator("angle_theta", allow_reuse=True, always=True)
     def glancing_incidence(cls, val):
         """Warn if close to glancing incidence."""