Precision Spindle Metrology

Precision Interferometric Metrology

In this paper, we propose the use of sinusoidalfrequency modulation on a laser diode (LD) toachieve both frequency stabilization of the LDand a displacement measurement with ahomodyne interferometer. The central frequencyof the LD is stabilized to a Doppler broadened(linear) absorption or a Doppler free (saturated)absorption line of iodine (I2) molecule near thew...

True precision limits in quantum metrology

Quantum mechanics provides insight into fundamental limits on the achievable measurement precision that cannot be beaten irrespectively of the extent of any improvements in measurement technology. The best known example is that of the optical phase measurement where difference of phase delays φ in the arms of interferometer in the absence of decoherence can only be measured up to a precision kn...

Enhancing Precision Manufacturing Through In-Situ Metrology

Optical fiber couplers for precision spaceborne metrology.

We describe the optical and mechanical design, construction philosophy, and testing of a pair of matched, spaceflight-qualified fiber couplers. The couplers were developed for the LISA Pathfinder mission but are relevant for other applications-both on ground and in space-where a robust fiber coupler with well-controlled beam parameters and stable beam pointing is required. This particular imple...

Precision bounds for noisy nonlinear quantum metrology