Deformometer for determining deformation of an optical cavity optic

A deformometer for determining deformation of an optical cavity optic disposed on an optical cavity, the deformometer comprising:

• a first optical cavity comprising:
• a cavity body;
• a first entry optical cavity optic disposed at an entry end of the cavity body;
• and
• a first exit optical cavity optic disposed at an exit end of cavity body, the first entry optical cavity optic in optical communication and optically opposing the first exit optical cavity optic,
• such that the first optical cavity:
• receives a reference gas at a first pressure P1;
• receives a first light;
• and
• produces a first filtered light from the first light;
• a second optical cavity comprising:
• a second entry optical cavity optic disposed at the entry end of the cavity body;
• and
• a second exit optical cavity optic disposed at the exit end of the cavity body, the second entry optical cavity optic in optical communication and optically opposing the second exit optical cavity optic,
• such that the second optical cavity:
• receives a second gas at a second pressure P2;
• receives a second light;
• and
• produces a second filtered light from the second light;
• a gas source in fluid communication with the second optical cavity and providing the second gas to the second optical cavity;
• and
• a second pump in fluid communication with the optical cavity to pump the second gas from the optical cavity;
• a first laser in optical communication with the first optical cavity and that provides the first light to the first optical cavity;
• and
• a second laser in optical communication with the second optical cavity and that provides the second light to the second optical cavity, such that the deformation of the first optical cavity optic, the second optical cavity optic, the third optical cavity optic, and the fourth optical cavity optic is determined from the first cavity signal and the second cavity signal.