d2:offset_phase_lock_servo
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d2:offset_phase_lock_servo [2018/11/14 17:47] – [Front Panel] Michael Radunsky | d2:offset_phase_lock_servo [2019/11/20 02:03] – [Modes] Michael Radunsky | ||
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Please read [[: | Please read [[: | ||
- | [[d2: | + | [[d2: |
+ | [[https:// | ||
=====Description===== | =====Description===== | ||
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The D2-135 comes in two different versions: | The D2-135 comes in two different versions: | ||
- | *// | + | *// |
*// | *// | ||
The D2-135-SMA requires an electrical signal input between 10 and -10 dBm of power. | The D2-135-SMA requires an electrical signal input between 10 and -10 dBm of power. | ||
- | The D2-135-FC-800 is no longer available, but information regarding it is retained for those users who have purchased this model. | + | The D2-135-FC-800 is no longer available, but information regarding it is retained for those users who have purchased this model. |
===== Absolute Maximum Ratings ===== | ===== Absolute Maximum Ratings ===== | ||
Note: All modules designed to be operated in laboratory environment | Note: All modules designed to be operated in laboratory environment | ||
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=====Specifications===== | =====Specifications===== | ||
<WRAP center round box 550px> | <WRAP center round box 550px> | ||
- | | | **Value** | + | | |
- | |**Min Offset Frequency**(( Low frequency beat-notes are in principle possible with the D2-135-SMA provided the low-frequency beat-note is a square-wave and not sine-wave input and that the loop bandwidth ~10 times lower than your reference frequency. | + | | **Min Offset Frequency**(( Low frequency beat-notes are in principle possible with the D2-135-SMA provided the low-frequency beat-note is a square-wave and not sine-wave input and that the loop bandwidth ~10 times lower than your reference frequency. |
- | |**Max Offset Frequency**| | + | | **Max Offset Frequency** |
- | |**VCO drift**| | + | | **VCO drift** |
- | |**PFD Noise**(( See [[# | + | | **PFD Noise**(( See [[# |
- | |**ω**< | + | | **ƒ**< |
- | |**ω**< | + | | **ƒ**< |
- | |**ω**< | + | | **ƒ**< |
- | |**Servo Output Range**| | + | | **Servo Output Range** |
- | |**Electronics Input / Output Impedance**| | + | | **Electronics Input / Output Impedance** |
- | |**User Adjustable Gain**(( Not including internal gain compensation for N divider. See [[# | + | | **User Adjustable Gain**(( Not including internal gain compensation for N divider. See [[# |
- | |**Max Electronic Beat-Note Input \\ (D2-135-SMA)**| | + | | **Max Electronic Beat-Note Input \\ (D2-135-SMA)** |
- | |**Min Electronic Beat-Note Input \\ (D2-135-SMA)**| | + | | **Min Electronic Beat-Note Input \\ (D2-135-SMA)** |
- | |**Min Electronic Beat-Note S/N \\ (D2-135-SMA)**| | + | | **Min Electronic Beat-Note S/N \\ (D2-135-SMA)** |
- | |**Max Optical Beat-Note Input \\ (D2-135-FC; obsolete)**| | + | | **Max Optical Beat-Note Input \\ (D2-135-FC; obsolete)** |
- | |**Min Optical Beat-Note Input \\ (D2-135-FC; obsolete)**((Approximate value as exact value depends on wavelength of the light and spatial overlap between the lasers.))| | + | | **Min Optical Beat-Note Input \\ (D2-135-FC; obsolete)**((Approximate value as exact value depends on wavelength of the light and spatial overlap between the lasers.)) |
- | |**Front-panel Input Connection\\ (D2-135-FC; obsolete)((D2-135-FC was shipped with an FC to SC multimode patch cord))**| | + | | **Front-panel Input Connection\\ (D2-135-FC; obsolete)((D2-135-FC was shipped with an FC to SC multimode patch cord))** |
- | |**Front-panel Input Connection\\ (D2-135-SMA)**| | + | | **Front-panel Input Connection\\ (D2-135-SMA)** |
- | |**External Reference Input Range**| | + | | **External Reference Input Range** |
</ | </ | ||
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=====Modes===== | =====Modes===== | ||
- | The OPLS operates in 12 different modes, controlled by the front-panel knob or with external inputs to the back-panel. These 12 modes select the value of the divide-by-N (N=8,16,32, or 64) and select between three states for the reference frequency (external input, internal VCO High, internal VCO Low). The table below shows the offset frequency ranges for these 12 different modes. | + | The OPLS operates in 12 different modes, controlled by the front-panel knob or with external inputs to the back-panel. These 12 modes select the value of the divide-by-N (N=8, 16, 32, or 64) and select between three states for the reference frequency (external input, internal VCO High, internal VCO Low). The table below shows the offset frequency ranges for these 12 different modes. |
<WRAP center round box 70%> | <WRAP center round box 70%> | ||
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^ ^^ N=8 ^ N=16 ^ N=32 ^ N=64 ^ | ^ ^^ N=8 ^ N=16 ^ N=32 ^ N=64 ^ | ||
^ Reference \\ Frequency \\ Setting | ^ Reference \\ Frequency \\ Setting | ||
- | ^::: | + | ^::: |
^::: | ^::: | ||
^::: | ^::: | ||
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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 <imgref opls_side_panel> | + | The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref opls_side_panel> |
=====Calculating Phase Noise ===== | =====Calculating Phase Noise ===== | ||
- | 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 the [[d2: |
'' | '' | ||
- | where N is the value of the divider and F< | + | where N is the value of the divider and F< |
=====Help ===== | =====Help ===== |
d2/offset_phase_lock_servo.txt · Last modified: 2023/11/16 00:02 by 127.0.0.1