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ice:servo-opl1 [2016/08/15 10:44]
127.0.0.1 external edit
ice:servo-opl1 [2020/09/25 09:21] (current)
Michael Radunsky [Calculating Phase Noise]
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 ^ ^  ICE-CP1-200  ^  ICE-CP1-500  ^  Units  ^ ^ ^  ICE-CP1-200  ^  ICE-CP1-500  ^  Units  ^
 ^ Current Source ^ ^ ^ ^ ^ Current Source ^ ^ ^ ^
-|<html> &nbsp;&nbsp; </html>Current range|  0-200  |  0-500  |  mA  | +|Current range|  0-200  |  0-500  |  mA  | 
-|<html> &nbsp;&nbsp; </html>Current setpoint resolution |  200  |  500  |  μA  | +|Current setpoint resolution |  200  |  500  |  μA  | 
-|<html> &nbsp;&nbsp; </html>Current noise density((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <100  |  <200  | pA / <HTML> <span style="text-decoration: overline;">Hz</span> </HTML> +|Current noise density((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <100  |  <200  | pA /  √Hz | 
-|<html> &nbsp;&nbsp; </html>RMS Noise (10Hz - 100kHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <50  |  <100  |  nA  | +|RMS Noise (10Hz - 100kHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <50  |  <100  |  nA  | 
-|<html> &nbsp;&nbsp; </html>RMS Noise (10Hz - 1MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <100  |  <150  |  nA  | +|RMS Noise (10Hz - 1MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <100  |  <150  |  nA  | 
-|<html> &nbsp;&nbsp; </html>RMS Noise (10Hz - 10MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <300  |  <500  |  nA  | +|RMS Noise (10Hz - 10MHz)((All measurements guaranteed on design and verified experimentally on D2-105 which uses same circuit.))|  <300  |  <500  |  nA  | 
-|<html> &nbsp;&nbsp; </html>Absolute accuracy|  2  ||  %  |+|Absolute accuracy|  2  ||  %  |
 ^ Offset Phase Lock Servo Input Signal^ ^^ ^  ^ Offset Phase Lock Servo Input Signal^ ^^ ^ 
-|<html> &nbsp;&nbsp; </html>Min Offset Frequency |  250  ||  MHz  | +|Min Offset Frequency |  250  ||  MHz  | 
-|<html> &nbsp;&nbsp; </html>Max Offset Frequency |  Min: 9, Typical: 10(( Maximum Offset Frequency depends on power of input beat-note signal.))  ||  GHz  | +|Max Offset Frequency |  Min: 9, Typical: 10(( Maximum Offset Frequency depends on power of input beat-note signal.))  ||  GHz  | 
-|<html> &nbsp;&nbsp; </html> Max Electronic Beat-Note Input \\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-SMA)|  10  ||  dBm  | +| Max Electronic Beat-Note Input \\ (ICE-CP1-SMA)|  10  ||  dBm  | 
-|<html> &nbsp;&nbsp; </html> Min Electronic Beat-Note Input \\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-SMA)|  -10  ||  dBm  | +| Min Electronic Beat-Note Input \\ (ICE-CP1-SMA)|  -10  ||  dBm  | 
-|<html> &nbsp;&nbsp; </html> Min Electronic Beat-Note S/N \\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-SMA)|  >50  ||  dB  | +| Min Electronic Beat-Note S/N \\ (ICE-CP1-SMA)|  >50  ||  dB  | 
-|<html> &nbsp;&nbsp; </html> Max Optical Beat-Note Input \\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-FC)|  1  ||  mW  | +| Max Optical Beat-Note Input \\ (ICE-CP1-FC)|  1  ||  mW  | 
-|<html> &nbsp;&nbsp; </html> Min Optical Beat-Note Input \\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-FC)((Approximate value as exact value depends on wavelength of the light and spatial overlap between the lasers.))|  50  ||  μW  | +| 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.))|  50  ||  μW  | 
-|<html> &nbsp;&nbsp; </html> Front-panel Input Connection\\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-FC)((ICE-CP1-FC is shipped with an FC to SC multimode patch cord))|  SC  ||    |  +| Front-panel Input Connection\\ (ICE-CP1-FC)((ICE-CP1-FC is shipped with an FC to SC multimode patch cord))|  SC  ||    |  
-|<html> &nbsp;&nbsp; </html> Front-panel Input Connection\\ <html> &nbsp;&nbsp; </html><html> &nbsp;&nbsp; </html>(ICE-CP1-SMA)|  SMA  ||    | +| Front-panel Input Connection\\ (ICE-CP1-SMA)|  SMA  ||    | 
 ^ Offset Phase Lock Servo Performance^ ^^ ^  ^ Offset Phase Lock Servo Performance^ ^^ ^ 
-|<html> &nbsp;&nbsp; </html>Bandwidth((May be limited by the bandwidth of the laser being servoed))|  TBD   ||  MHz  | +|Bandwidth((May be limited by the bandwidth of the laser being servoed))|  TBD   ||  MHz  | 
-|<html> &nbsp;&nbsp; </html> Interval reference frequency drift |  +/-20  ||  ppm  | +| Interval reference frequency drift |  +/-20  ||  ppm  | 
-|<html> &nbsp;&nbsp; </html> PFD Noise(( See [[#calculating_phase_noise|Calculating Phase Noise section]] for a full description))|  -213  ||  dBc/Hz  |+| PFD Noise(( See [[#calculating_phase_noise|Calculating Phase Noise section]] for a full description))|  -213  ||  dBc/Hz  |
 ^ Loop Filter Parameters ^ ^^ ^ ^ Loop Filter Parameters ^ ^^ ^
-|<html> &nbsp;&nbsp; </html>Proportional Gain  |  -72 -- 0  ||  dB  | +|Proportional Gain  |  -72 -- 0  ||  dB  | 
-|<html> &nbsp;&nbsp; </html>Proportional Gain Resolution |  2  ||  dB  | +|Proportional Gain Resolution |  2  ||  dB  | 
-|<html> &nbsp;&nbsp; </html>Integrator|  3, 10, 30, 100, 300  ||  kHz  | +|Integrator|  3, 10, 30, 100, 300  ||  kHz  | 
-|<html> &nbsp;&nbsp; </html>Differential |  Off, 10, 30, 100, 300  ||  kHz  | +|Differential |  Off, 10, 30, 100, 300  ||  kHz  | 
-|<html> &nbsp;&nbsp; </html>Differential Gain |  18  ||  dB  |+|Differential Gain |  18  ||  dB  |
  
 ^Electrical Specifications^^^^^ ^Electrical Specifications^^^^^
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 Two numbers control the offset frequency of the ICE-OPL1: 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. A sequence of frequencies and frequency ramps can be programmed using OPL1's DDS Queue. Alternatively, 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-OPL1: 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. A sequence of frequencies and frequency ramps can be programmed using OPL1's DDS Queue. Alternatively, 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><html><center></html> ** Offset = N * Reference Frequency **<html></center></html></WRAP>+<WRAP center round box 450px> ** Offset = N * Reference Frequency **</WRAP>
  
 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 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><html><center></html> **D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(F<sub>REF</sub>)**<html></center></html></WRAP>+<WRAP center round box 450px> **D2-135 Phase-Noise Floor = -213 + 20Log(N) + 10Log(F<sub>REF</sub>)**</WRAP>
  
 where N is the value of the divider and F<sub>REF</sub> is the reference frequency as measured in Hz. For more details, please see [[http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/|http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/]] . where N is the value of the divider and F<sub>REF</sub> is the reference frequency as measured in Hz. For more details, please see [[http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/|http://www.vescent.com/2012/calculating-phase-noise-from-the-d2-135/]] .
ice/servo-opl1.1471283078.txt.gz · Last modified: 2016/08/15 10:44 by 127.0.0.1