ice:servo-opls
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ice:servo-opls [2019/11/18 23:28] – [Specifications] Michael Radunsky | ice:servo-opls [2021/05/20 22:40] – external edit 127.0.0.1 | ||
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===== Specifications | ===== Specifications | ||
- | ^ ^ ICE-CP1-200 | + | ^ |
- | ^ Current Source ^ ^ ^ ^ | + | ^ Current Source |
- | |Current range| | + | | Current range |
- | |Current setpoint resolution | 200 | 500 | μA | | + | | Current setpoint resolution |
- | |Current noise density((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))| < | + | | Current noise density |
- | |RMS Noise (10Hz - 100kHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))| < | + | | RMS Noise (10Hz - 100kHz) |
- | |RMS Noise (10Hz - 1MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))| < | + | | RMS Noise (10Hz - 1MHz) | < |
- | |RMS Noise (10Hz - 10MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))| < | + | | RMS Noise (10Hz - 10MHz) |
- | |Absolute accuracy| | + | | Absolute accuracy |
- | ^ Offset Phase Lock Servo Input Signal^ ^^ ^ | + | ^ Offset Phase Lock Servo Input Signal |
- | |Min Offset Frequency | 250 || MHz | | + | | Min Offset Frequency |
- | |Max Offset Frequency | Min: 9, Typical: 10(( Maximum Offset Frequency depends on power of input beat-note signal.)) | + | | 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 | -72 -- 0 || dB | | + | | Proportional Gain |
- | |Proportional Gain Resolution | 2 || dB | | + | | Proportional Gain Resolution |
- | |Integrator| | + | | Integrator |
- | |Differential | Off, 10, 30, 100, 300 || kHz | | + | | Differential |
- | |Differential Gain | 18 || dB | | + | | Differential Gain |
^Electrical Specifications^^^^^ | ^Electrical Specifications^^^^^ | ||
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Two numbers control the offset frequency of the ICE-CP1: The divider setting N and the reference frequency. The divider setting N can be set to N=8,16,32 or 64. The reference frequency can be generated internally with a range from 50 - 240 MHz. Or an external frequency reference can be provided (external frequency must be from 32 MHz - 240 MHz). The offset frequency of the laser is given by the following formula: | Two numbers control the offset frequency of the ICE-CP1: The divider setting N and the reference frequency. The divider setting N can be set to N=8,16,32 or 64. The reference frequency can be generated internally with a range from 50 - 240 MHz. Or an external frequency reference can be provided (external frequency must be from 32 MHz - 240 MHz). The offset frequency of the laser is given by the following formula: | ||
- | <WRAP center round box 450px>< | + | <WRAP center round box 260px> **Offset = N * Reference Frequency** </ |
The table below shows the offset range for different values of N and using the internal or external frequency reference. | The table below shows the offset range for different values of N and using the internal or external frequency reference. | ||
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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