Devices, systems, and methods with a piezoelectric-driven light intensity modulator

An optically pumped magnetometer, comprising:

• at least one light source;
• a vapor cell;
• and
• a light intensity modulator disposed between the at least one light source and the vapor cell, the light intensity modulator comprising
• an input optical fiber, wherein the input optical fiber is configured to receive light emitted by the at least one light source,
• an output optical fiber, wherein the output optical fiber is configured to transmit light for illumination of the vapor cell,
• an optical arrangement comprising a lens, wherein the optical arrangement is configured to receive light from the input optical fiber, pass the light through the lens, and direct the light to the output optical fiber, and
• a piezoelectric device coupled to the lens, wherein the piezoelectric device is configured for moving the lens to alter overlap of the output optical fiber and the light directed to the output optical fiber to modulate intensity of light in the output optical fiber.