ice:servo-opls
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ice:servo-opls [2019/11/18 23:28] – [Table] Michael Radunsky | ice:servo-opls [2019/11/18 23:33] – [Understanding the Transfer Function] Michael Radunsky | ||
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===== Specifications | ===== Specifications | ||
- | ^ | + | ^ |
- | ^ Current Source | + | ^ Current Source |
- | | Current range | + | | Current range |
- | | Current setpoint resolution | + | | Current setpoint resolution |
- | | Current noise density((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) | + | | Current noise density((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) |
- | | RMS Noise (10Hz - 100kHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) | + | | RMS Noise (10Hz - 100kHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) |
- | | RMS Noise (10Hz - 1MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) | + | | RMS Noise (10Hz - 1MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) |
- | | RMS Noise (10Hz - 10MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) | + | | RMS Noise (10Hz - 10MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.)) |
- | | Absolute accuracy | + | | Absolute accuracy |
- | ^ Offset Phase Lock Servo Input Signal | + | ^ Offset Phase Lock Servo Input Signal |
- | | Min Offset Frequency | + | | Min Offset Frequency |
- | | Max Offset Frequency | + | | Max Offset Frequency |
- | | Max Electronic Beat-Note Input \\ (ICE-CP1-SMA) | + | | Max Electronic Beat-Note Input \\ (ICE-CP1-SMA) |
- | | Min Electronic Beat-Note Input \\ (ICE-CP1-SMA) | + | | Min Electronic Beat-Note Input \\ (ICE-CP1-SMA) |
- | | Min Electronic Beat-Note S/N \\ (ICE-CP1-SMA) | + | | Min Electronic Beat-Note S/N \\ (ICE-CP1-SMA) |
- | | Max Optical Beat-Note Input \\ (ICE-CP1-FC) | + | | Max Optical Beat-Note Input \\ (ICE-CP1-FC) |
- | | Min Optical Beat-Note Input \\ (ICE-CP1-FC)((Approximate value as exact value depends on wavelength of the light and spatial overlap between the lasers.)) | + | | Min Optical Beat-Note Input \\ (ICE-CP1-FC)((Approximate value as exact value depends on wavelength of the light and spatial overlap between the lasers.)) |
- | | Front-panel Input Connection\\ (ICE-CP1-FC)((ICE-CP1-FC is shipped with an FC to SC multimode patch cord)) | + | | Front-panel Input Connection\\ (ICE-CP1-FC)((ICE-CP1-FC is shipped with an FC to SC multimode patch cord)) |
- | | Front-panel Input Connection\\ (ICE-CP1-SMA) | + | | Front-panel Input Connection\\ (ICE-CP1-SMA) |
- | ^ Offset Phase Lock Servo Performance | + | ^ Offset Phase Lock Servo Performance |
- | | Bandwidth((May be limited by the bandwidth of the laser being servoed)) | + | | Bandwidth((May be limited by the bandwidth of the laser being servoed)) |
- | | Interval reference frequency drift | +/-20 || ppm | | + | | Interval reference frequency drift | +/-20 || ppm | |
- | | PFD Noise(( See [[# | + | | PFD Noise(( See [[# |
- | ^ Loop Filter Parameters | + | ^ Loop Filter Parameters |
- | | Proportional Gain | + | | Proportional Gain |
- | | Proportional Gain Resolution | + | | Proportional Gain Resolution |
- | | Integrator | + | | Integrator |
- | | Differential | + | | Differential |
- | | Differential Gain | + | | Differential Gain |
^Electrical Specifications^^^^^ | ^Electrical Specifications^^^^^ | ||
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- | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> | + | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> |
=====Calculating Phase Noise ===== | =====Calculating Phase Noise ===== | ||
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The phase-noise specified in Section 1.3 is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula: | The phase-noise specified in Section 1.3 is referenced to the phase frequency detector (PFD) at 1 Hz. To convert that to the noise measured on the actual beat-note, it must be rescaled with the following formula: | ||
- | <WRAP center round box 450px>< | + | <WRAP center round box 450px> **D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(ƒ< |
- | where N is the value of the divider and F< | + | where N is the value of the divider and ƒ< |
ice/servo-opls.txt · Last modified: 2021/08/26 15:26 by 127.0.0.1