Optical modulator robust to fabrication errors through an RF electrical crossing

An optical modulator comprising:

• a first Radio Frequency (RF) line and a second RF line;
• an optical waveguide along a length of the modulator with an input and an output;
• and
• a plurality of segments along the length including a first set of segments, a single RF line crossing after the first set of segments, and a second set of segments after the RF line crossing, and wherein the RF line crossing is located off center relative to the plurality of segments, wherein each of the first RF line and the second RF line extend along the length and cross one another at the RF line crossing,
• wherein a geometry of the single RF line crossing includes one or more of
• a length of unloaded lines, selected based on one or more characteristics including any capacitance, inductance, impedance, propagation speed, and dielectric constant,
• a width of the unloaded lines, selected based on one or more characteristics including any capacitance, inductance, impedance, propagation speed, and dielectric constant,
• metal features around the RF line crossing, selected based on one or more characteristics including any capacitance, inductance, impedance, propagation speed, and dielectric constant, and
• an angle of crossing lines connected to respective unloaded lines, selected based on one or more characteristics including any capacitance, inductance, impedance, propagation speed, and dielectric constant.