mini circuits zx603018g s low noise microwave amplifiers  (Mini-Circuits)

Journal: Sensors (Basel, Switzerland)

Article Title: A Single-Cell Optically Pumped Intrinsic Gradiometer

doi: 10.3390/s26051678

Figure Lengend Snippet: Optical layout and readout of the Rb 87 intrinsic gradiometer. A 795 nm probe beam is linearly polarized and passes through the vapor cell, while a 795 nm pump beam is split into two equal beams, propagating orthogonally to the probe beam, and circularly polarized with opposing helicity to define two spatially separated sensing volumes. Passing through the cell, the probe beam will have rotated its polarization in proportion to the difference in ambient field between the volumes. A balanced polarimeter measures the rotation by passing vertical and horizontal polarization components to photodiodes. The components are passed to a transimpedance amplifier and finally digitized by an ADC. Red arrows indicated beam propagation direction, the black arrow indicates an electrical connection between components. Grey and black shapes represent electronic and optical components of the sensor.

Article Snippet: Photodiode signals from each channel of the balanced polarimeter were amplified using low-noise transimpedance amplifiers (AMP110, Thorlabs, Newton, NJ, USA)) with a gain of 10 6 V/A.

Techniques:

Journal: Sensors (Basel, Switzerland)

Article Title: A Single-Cell Optically Pumped Intrinsic Gradiometer

doi: 10.3390/s26051678

Figure Lengend Snippet: Measured frequency response of the sensor output under a swept sinusoidal calibration field. The amplitude is normalized and shown in dB. The −3 dB cutoff occurs at approximately 1372 Hz, consistent with the electronics-limited bandwidth of the transimpedance amplifier. The blue curve shows the normalized frequency response. The dashed line indicates the amplitude and frequency corresponding to the −3 dB cutoff and the red marker indicates the −3 dB point.

Article Snippet: Photodiode signals from each channel of the balanced polarimeter were amplified using low-noise transimpedance amplifiers (AMP110, Thorlabs, Newton, NJ, USA)) with a gain of 10 6 V/A.

Techniques: Marker