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2024/10/27 14:11
FFC-100 Fiber Frequency Comb Manual
Model No. FFC-100-100 and FFC-100-200
Document Last Updated on 2024/10/21 20:15
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Limited Warranty
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Fiber Frequency Comb
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Quick Start
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FFC-100 Spec
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General FFC-100
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Locking the FFC-100 using the FPGA
Description
The FFC-100 is Vescent's premier turn-key, deployable fiber frequency comb. It is ideal for use in an
optical clock, dual-comb spectrometer, or to transfer the precision of an optical frequency reference
to another part of the spectrum. It boasts in-loop fractional instability of <10
f
.
opt
Product Manuals - https://vescent.com/manuals/
1/26
and
General Warnings and Cautions
Fig. 1: The FFC-100
page.
Guide.
API.
page.
Sheet.
Operation.
Software.
prior to operating the FFC-100.
sales [at] vescent [dot] com
FFC-100 Fiber Frequency Comb Manual
for questions and
-17
-18
on f
and <10
CEO
on
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Table of Contents
Related Manuals for Vescent FFC-100
Summary of Contents for Vescent FFC-100
- Page 1 Software. Description The FFC-100 is Vescent's premier turn-key, deployable fiber frequency comb. It is ideal for use in an optical clock, dual-comb spectrometer, or to transfer the precision of an optical frequency reference to another part of the spectrum. It boasts in-loop fractional instability of <10 on f and <10...
- Page 2 List of Warning Symbols Warning. Pay special attention to procedures and notes. If procedure is not followed carefully, damage to the FFC-100 or devices connected to it may occur. Potential for electrical shock hazard. Absolute Maximum Ratings and Power Input Note: All modules designed to be operated in a laboratory environment.
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Page 3: Proper Usage
Tab. 1: Absolute Maximum Ratings The FFC-100 employs a proprietary design hybrid power supply that is both low noise and capable of accepting a range of AC input line voltages. It will accept input line voltages within the ranges shown... -
Page 4: Specifications
ffc:100m https://vescent.com/manuals/doku.php?id=ffc:100m Always clean both fiber facets before mating fibers. The ports of the FFC-100 should be cleaned with a fiber optic bulkhead cleaner before every connection. Cleaning the fiber facets keeps ports free of debris that could damage FFC-100 bulkhead fibers. - Page 5 2024/10/27 14:11 5/26 FFC-100 Fiber Frequency Comb Manual Parameter Min. Typ. Max. Units Comments >30 nm Amplifier Average optical Output Power bandwidth Supercontinuum 1000-2000 nm Output Power spectrum RF Outputs connectors are SMA ƒ Signal-to-Noise 100 kHz RBW Ratio ƒ...
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Page 6: Front Panel
EDFA Monitor Port (FC/APC) Supercontinuum Output Port (FC/APC) Input Port for f detection (FC/APC). optical SMA monitor for FFC-100 Repetition Rate f SMA monitor for f optical SMA monitor for Carrier Envelope Offset frequency f Parameter input adjustment rotary knobs... -
Page 7: Rear Panel
When a particular field is actively being edited, its border will change to yellow. If a field is selected, but not changed after 60 seconds the field will flash red and become deselected without changing its value. The Home Screen of the FFC-100 is shown in figure 4. - Page 8 Touch the field to select a new value/status. For instance, in figure 4 the FFC-100 laser output is off. Touching the SYSTEM OFF button will allow the FFC-100 to be placed into STANDBY, and then subsequently for the laser output to be powered on.
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Page 9: Entering Values
2024/10/27 14:11 9/26 FFC-100 Fiber Frequency Comb Manual Fig. 7: Lock button (shown in unlocked mode) Locks out further modification of parameters. Touch to lock or unlock parameter entry. There are some parameters with values which can be changed while the system is locked, such as the PZT range, but in general parameters which control a state or value, such as the set point temperature of a pump diode, cannot. - Page 10 Last update: 2024/10/21 20:15 ffc:100m https://vescent.com/manuals/doku.php?id=ffc:100m Fig. 9: Pop-up Keypad The action initiated by each button is described below. Escape Fig. 10: Escape button Exits keypad without accepting changes. Clear Fig. 11: Clear button Clears value in field being edited.
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Page 11: Home Screen
You will notice that, while in System Off mode, the Laser On option is grayed out in the menu and is not able to be selected. To turn the FFC-100 all the way on and begin lasing, it is necessary to first wait for all internal temperatures to reach their setpoints and settle to... - Page 12 16) and select “Laser On” (figure 17). The FFC should commence lasing and the Mode-locked indicator should turn green (figure 18). Fig. 16: The FFC-100 GUI: in Standby mode Fig. 17: The FFC-100 GUI: Standby to System On https://vescent.com/manuals/ Printed on 2024/10/27 14:11...
- Page 13 Fig. 18: System On To turn the FFC-100 off, place it back into standby mode and wait a moment. The FFC-100 will place itself back into System Off mode automatically, after which it is safe to power the system down. Do not change the state of the FFC-100 directly from “LASER ON”...
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Page 14: Temperature Screen
Keypad as described here. Changing the cavity temperature is not generally necessary, as factory presets will allow normal use of the FFC-100. However, if you are trying to hit a specific frequency (to synchronize two combs, for instance), changing the temperature is the primary method of making this adjustment. - Page 15 Each PID term can be controlled, or toggled individually in this way. Additionally, by touching the “Slew [°C/min]” field, a limit can be placed on the speed at which the FFC-100 servos the temperature of the cavity. In general, these settings are optimized and set in-factory for each FFC-100 individually, and should not need to be adjusted.
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Page 16: System Settings
21) can be accessed by touching the gear icon in the control bar, and gives access to the FFC-100's current firmware version, as well as options for changing its screen brightness and its volume. To change the screen brightness, either turn the Left (L) rotary knob, or touch the arrows on either side of the brightness bar. -
Page 17: Initial Setup
(<1 kHz) and as such should be used solely for locking f , which is its main function. While it is not necessary to change the repetition rate of the FFC-100 for normal use, it can be helpful in certain set ups, such as when synchronizing two Frequency Combs. - Page 18 Fig. 22: FFC-100 electrical and optical connection diagram (Click for larger image) Example Spectra The following are example spectra of several of the FFC-100's outputs. Data for these spectra were taken with a RIO Planex laser in normal, laboratory conditions. Similar measurements for your specific FFC-100 can be found in the CoC shipped with your unit.
- Page 19 1575 mA as well as the spectra shown in figure Fig. 24: Example EDFA Out spectrum from FFC-100 Supercontinuum Out This is a PM FC/APC fiber output that is the direct output of the f detector module.
- Page 20 Last update: 2024/10/21 20:15 ffc:100m https://vescent.com/manuals/doku.php?id=ffc:100m Fig. 25: Supercontinuum Output of FFC-100 Repetition Rate This is an SMA monitor port of the frequency comb repetition rate with the RF spectrum shown in figure 26. The comb reaches a repetition rate of 200 MHz at an oscillator cavity temperature of 20.1°C.
- Page 21 2024/10/27 14:11 21/26 FFC-100 Fiber Frequency Comb Manual Fig. 27: Optical Heterodyne between CW RIO Planex and FFC-100 Carrier Envelope Offset This is an SMA monitor port of the frequency comb f RF parameter with the RF spectrum shown in figure...
- Page 22 PZT, and press the “Activate Temperature Slow Loop” button at the top of the tab. For example, if your FPGA is on COM4, and your FFC-100 is on COM8, type “8” into the “FFC Com Port:” field and then press the button. This will bring up a command prompt window which will display information about the Slow Loop, such as the cavity temperature, and the current PZT setpoint.
- Page 23 We recommend setting this to 30V, which is right in the middle of the FFC-100's range. The gain comes preconfigured for each unit, but can also be changed through this menu (WE DO NOT ADVISE changing the gain without input from the Vescent technical staff).
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Page 24: Troubleshooting/Common Issues
Remember to shut off the slow servo, either by disabling it from the home menu or by pressing the On/Off button in the slow servo menu, when unlocking the FFC-100. Troubleshooting/Common Issues While we aim to make the user experience of the FFC-100 as simple and intuitive as possible, the fact https://vescent.com/manuals/ Printed on 2024/10/27 14:11... - Page 25 If, after placing the FFC-100 from “Standby” into “Laser On” mode, the button flashes for 5 seconds and then does not turn on, it is possible that the Interlocks on the back of the FFC-100 are not in the correct state. Check that both the Key, and BNC interlocks are correctly installed and in the right position and try again.
- Page 26 Last update: 2024/10/21 20:15 ffc:100m https://vescent.com/manuals/doku.php?id=ffc:100m From: https://vescent.com/manuals/ - Product Manuals Permanent link: https://vescent.com/manuals/doku.php?id=ffc:100m Last update: 2024/10/21 20:15 https://vescent.com/manuals/ Printed on 2024/10/27 14:11...
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