Some features of NV.

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# Some features of NV. - PowerPoint PPT Presentation

Some features of NV. Vincent Loriette. NV main objectives. Evaluate the effect of imperfections on the shot-noise limited sensitivity. Fix some tolerances. Find free parameters optimal values (modulation depth, démodulation phase, etc.). NV main features.

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### Some features of NV.

Vincent Loriette

NV main objectives
• Evaluate the effect of imperfections on the shot-noise limited sensitivity.
• Fix some tolerances.
• Find free parameters optimal values (modulation depth, démodulation phase, etc.)
NV main features
• All optical parameters can be varied.
• Free mirror shapes.
• Free orientation and shape of the incident beam.
• Free modulation amplitude and frequency.
• Fields are represented as finite sums of HG functions (no FFT).
• Fast code.
• No diffraction in free space.
• Not suited to work with exotic beam shapes.
• Optimization steps use realistic error signals.
• Realistic resonnance and antiresonnance seeks.
• Not necessarilly optimal (in the math sense).
Computation example : north arm refectance

ORFP_n=ORni_o+OTni_i*inv(OId-exp(-i*phi_n)*OFPn)*(OPna*ORne_i*OPna*exp(-i*phi_n))*OTni_o;

Edges diffraction

Airy peak,…

Mode réfléchi

Mode incident

Roughness indiced mode coupling

Effects of heating

North arm reflectance without… and with thermal effects (stable)

NV main window

Various optimizations can be performed

Each optical parameter can be associated with an experimental measurement datafile