ice:servo-opls
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ice:servo-opls [2014/07/03 18:07] – [Absolute Maximum Ratings] jtshugrue | ice:servo-opls [2021/08/26 15:26] (current) – external edit 127.0.0.1 | ||
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Please read [[: | Please read [[: | ||
+ | |||
+ | The guide to programming the ICE-CP1 through serial commands can be [[ice: | ||
===== Description ===== | ===== Description ===== | ||
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===== Specifications | ===== Specifications | ||
- | ^ ^ ICE-CP1-200 | + | ^ |
- | ^ Current Source ^ ^ ^ ^ | + | ^ Current Source |
- | |< | + | | Current range |
- | |< | + | | Current setpoint resolution |
- | |< | + | | Current noise density |
- | |< | + | | RMS Noise (10Hz - 100kHz) |
- | |< | + | | RMS Noise (10Hz - 1MHz) | < |
- | |< | + | | RMS Noise (10Hz - 10MHz) |
- | |< | + | | Absolute accuracy |
- | ^ Offset Phase Lock Servo Input Signal^ ^^ ^ | + | ^ Offset Phase Lock Servo Input Signal |
- | |< | + | | Min Offset Frequency |
- | |< | + | | Max Offset Frequency |
- | |< | + | | Max Electronic Beat-Note Input \\ (ICE-CP1-SMA) |
- | |< | + | | Min Electronic Beat-Note Input \\ (ICE-CP1-SMA) |
- | |< | + | | Min Electronic Beat-Note S/N \\ (ICE-CP1-SMA) |
- | |< | + | | 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.)) |
- | |< | + | | 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) |
- | ^ Offset Phase Lock Servo Performance^ ^^ ^ | + | ^ Offset Phase Lock Servo Performance |
- | |< | + | | Bandwidth((May be limited by the bandwidth of the laser being servoed)) |
- | |< | + | | Interval reference frequency drift | +/-20 || ppm |
- | |< | + | | PFD Noise(( See [[# |
- | ^ Loop Filter Parameters ^ ^^ ^ | + | ^ Loop Filter Parameters |
- | |< | + | | Proportional Gain |
- | |< | + | | Proportional Gain Resolution |
- | |< | + | | Integrator |
- | |< | + | | Differential |
- | |< | + | | 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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=====Understanding the Transfer Function===== | =====Understanding the Transfer Function===== | ||
- | < | + | < |
- | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in < | + | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in < |
=====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< |
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</ | </ | ||
- | **Beat Note Input ** | + | **Beat Note Monitor |
+ | |||
+ | The Front Panel for the ICE-CP1 has four SMA or FC connectors. The top-most connector is an SMA which is the digitized (i.e. square-wave) version of the input beat-note after a divide-by-2. For example, if the input beat note is 6 GHz, the monitor will have a 3 GHz output. | ||
- | The Front Panel for the ICE-CP1 has four SMA or FC connectors. The top connector (SMA for ICE-CP1-SMA, | ||
**External Reference Frequency Input ** | **External Reference Frequency Input ** | ||
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The Front Panel for the ICE-CP1 has four SMA or FC connectors. The second top-most connector is an SMA input for the external frequency reference. The input is AC coupled and 50 Ω terminated. Max power is 10 dBm. | The Front Panel for the ICE-CP1 has four SMA or FC connectors. The second top-most connector is an SMA input for the external frequency reference. The input is AC coupled and 50 Ω terminated. Max power is 10 dBm. | ||
- | **Beat Note Monitor | + | **Beat Note Input ** |
- | + | ||
- | The Front Panel for the ICE-CP1 has four SMA or FC connectors. The second bottom-most connector is an SMA containing is the digitized (i.e. square-wave) version of the input beat-note after a divide-by-2. For example, if the input beat note is 6 GHz, the monitor will have a 3 GHz output. | + | |
+ | The Front Panel for the ICE-CP1 has four SMA or FC connectors. The SMA connector 2< | ||
**Laser Current ** | **Laser Current ** | ||
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Only for OEM versions of the ICE-CP1 purchased without the [[ice: | Only for OEM versions of the ICE-CP1 purchased without the [[ice: | ||
</ | </ | ||
+ | |||
+ | < | ||
**Beat Note Input ** | **Beat Note Input ** |
ice/servo-opls.1404410878.txt.gz · Last modified: 2021/08/26 14:26 (external edit)