Category Archives: Uncategorized

SMC111 Ventoux – Current Source BNC Interface

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Features

  • For use with SMC11 Low-Noise Current Source
  • 4 BNCs  for control and diagnostic
    • DC Current monitor
    • Current Limit monitor
    • Current Setpoint input
    • Remote Interlock
    • Photodiode Monitoring
  • EMI-noise immunity
  • 3D Models

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3U/4HP front panel not shown.

Applications

  • Laser frequency control
  • Phase-locked lasers
  • Diode laser remote control
  • Ideal for rapid prototyping

Overview

In order to keep our SM-Series modules compact, only essential interface components are located on a front-panel.

Nevertheless more control features are always available accessing the internal busses of a specific module. For a customized application, the SMZ110, SMZ120 and SMZ130 modules provide a convenient way to access any of these signals.

Based on the SMZ110, the SMC111 module is dedicated to the SMC11 Low-Noise Current Source. It accomodates 5 BNC connectors for control, diagnostic or monitor purposes.

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SMC-Series Diode Laser Controller modules

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3U/4HP front panel not shown.

SMA11 – DC Error Controller

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Features

  • Front panel knob (+/-500mV or +/-5V)
  • BNC control input (+/-10V)
  • DC-Error signal monitoring
  • For use with SMA10 RF Mixer module
  • EMI noise immunity
  • Free of digital noise
  • Schematic diagrams included

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Applications

  • Locking point control
  • RF-optical heterodyne lock
  • Laser frequency stabilization
  • Pound-Drever-Hall lock
  • Residual amplitude modulation (RAM) compensation
  • Ideal for rapid prototyping

Overview

The SMA11 DC Error Controller module was designed to control the locking point of a RF-optical heterodyne lock (also known as Pound-Drever-Hall lock).

In a well-designed laser frequency locking electronics, the DC offset of the error signal can be neglected and no lock-acquistion  problems should occur. But electronics are not the only source of offset voltages and, faced with a high-level of residual amplitude modulation (RAM) the resulting DC baseline can be large enough to induce significant locking point errors. Moreover, in presence of high-finesse cavities, this DC component due to the RAM makes the lock acquisition difficult, indeed impossible.  In such a case, a RAM offset cancellation must be provided.

For this purpose the SMA11 module is used to control the DC level of the error signal delivered by the SMA10 RF Frequency Mixer.  The DC level is either adjusted using the front panel knob or the input voltage. The DC range of the potentiometer (+/-5V or +/-500mV) is selected using the dedicated switch. The control voltage resulting from the combination of these settings can be summed to the mixer output through the analog bus connector. This signal is also copied and fed to the front panel for monitoring.

Like all SM-Series modules, the SMA11 is shipped with the schematic diagrams of its electronic circuitry providing all required information for advanced users.

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RF & Analog Design

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Whether you are looking circuit design consulting assistance or full turn-key solution, Sisyph has the ability to design custom analog and RF instruments for your research.

RF & Analog Design Capabilities Include:

  • Consulting Services
  • Analog / RF Signal Processing
  • Schematic Capture / PCB Design & Layout
  • Prototyping
  • Low-Volume Manufacturing
  • Training Course

Specific Areas of Expertise:

  • Power Supplies
  • Active & Passive Filters
  • Low-Noise Amplifiers
  • Photodetectors
  • Signal Conditioning
  • VCO
  • AOM Drivers
  • Mixers
  • Phase/Frequency Discriminators
  • PLL
  • Loop-Filters
  • High-Voltage (<10kV-10W)
  • EOM/Piezo Drivers
  • Power Amplifiers
  • TEC Drivers
  • Servo Compensators
  • Subnanosecond Pulse Generators

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Control System Engineering

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Since AMO physics experiments rely on numerous servo systems, our extensive expertise can save time and effort during all phases of your project.

Control Systems Design Capabilities Include:

  • Consulting Services
  • Analog Control
  • Modeling
  • Simulation
  • Loopshaping/Tuning
  • Noise Analysis
  • Non-Linear Compensation
  • Prototyping
  • Training Course

Specific Areas of Expertise:

  • Very-High-Finesse Cavities/Laser Frequency Stabilizations
  • Automatic Acquiring Lock Systems
  • Optical Phase-Locked Loops
  • Multiple-Path Compensators
  • High-Speed/Low-Noise Servo Loops
  • High-Gain Compensators
  • Loopshaping/Optimization
  • AOM/EOM Drivers
  • Diode Laser Drivers

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SMC-Series Diode Laser Controller Modules

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The lowest noise, highest bandwidth and most flexible of any commercially available products

Features

  • Highly stable operation
  • Ultra low-noise current source
  • High-resolution temperature controller
  • Linear TEC driver
  • High reliability
  • EMI shielding

Applications

  • Photonics
  • Opto-electronic oscillators
  • Time-frequency standards
  • Optical phase-locked loops
  • Inertial navigation
  • Atomic clocks
  • Cold-atom physics
  • Quantum computing
  • Gravity measurements
  • Ideal for RIO Planex™ lasers

Overview

The SMC-Series modules are the ideal instruments for controlling the current and the temperature of diodes laser in AMO physics. With an  ultra-low current noise density  of 15pA/√Hz (SMC11) and sub-mK thermal control stability (SMC20 & SMC31), the SMC-Series is the right choice for the most demanding applications.

Because SMC-Series was first designed for frequency stabilization and OPLL applications, the SMC11 current source provides both Servo and RF inputs for current modulation over large bandwidths. Its ultra-low noise current feature is a key parameter for achieving the best phase noise performance of your stabilized lasers. In addition, maintaining a laser lock continuously is  facilitated due to the SMC20 temperature controller high-stability and analog setpoint control features .

Using the SMC-Series laser diode controller with the SMA- or SMB-Series modules, complete turn-key solutions are available for your laser frequency stabilizations or phase-locked lasers.

Like SMA- and SMB-Series modules, most of the SMC-Series modules are shipped with the schematic diagrams of their electronic circuitry providing all required information for  advanced users

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SMC31 Mont Aigoual – 1A Linear TEC Driver

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Features

  • Power Voltage-to-Current Converter (VCC)
  • Bridge-Tied Load power stage
  • Continuous +/-1A output current
  • 4V min. compliance voltage
  • Linear power stage (no PWM)
  • Short-circuit protection
  • Over-temperature protection
  • Current limiter
  • Reliable operation
  • Analog design – Free of digital noise
  • No  limit-cycle oscillations
  • Circuit diagrams included
  • 3D models

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Top View
Oblique View

Front panel not shown

Applications

  • Closed/open-loop control of TEC
  • Diode laser thermal control
  • For use with C20 Temperature Controller
  • Laser frequency stabilization
  • Phase-locked lasers
  • Opto-electronic oscillators
  • Ideal for rapid prototyping

Overview

The SMC-Series modules are the ideal instruments for controlling the current and the temperature of diodes laser for AMO physics. With an ultra-low current noise density  15pA/√Hz (SMC11) and sub-mK thermal control stability (SMC20), the SMC-Series is the right choice for the most demanding applications.

Because the SMC31 TEC Driver was first designed as power stage of the SMC20 temperature controller, it features an efficient power voltage-to-current converter. Using the SMC31, continuous output current up to 1A can be delivered to the thermoelectric cooler. Since noise is a primary concern, the SMC31 is based on a linear power amplifier stage providing a clean output current.

In addition, the SMC31 offers multiple protection features, including current limitation, over-temperature and short-circuit detection. Thermistor and TEC connections from the laser head to the SMC-Series Controller modules are made by the use of the DSUB-9 connector located on front panel.
Like all SM-Series modules, the SMC31 is shipped with the schematic diagrams of its electronic circuitry providing all required information for advanced users.

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Additionals Views

Bottom View
Left View
Right View

Front panel not shown

SMC20 Cézallier – Temperature Controller

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Features

  • Low-drift  <1mK/°C at room temperature
  • 10-kΩ thermistor
  • Operation from 17°C to 31°C
  • Two modes of operation:
    • constant current (CC)
    • constant temperature (CT)
  • PID compensator
    • Anti-windup integrator
    • Bumpless switching from CC to CT
  • 50mK/V temperature modulation input
  • 500mK/V temperature setpoint input
  • Fault detection :
    • open/shorted sensor,
    • out-of-range temperature
    • power stage fault
  • Remote control supported
  • Analog design – Free of digital noise
  • EMI-noise immunity
  • High-reliability
  • Schematic diagrams included
  • 3D Models

Contact Sisyph

Front panel not shown

Applications

  • Diode laser thermal control
  • For use with SMC31 Power Stage
  • Laser frequency stabilization
  • OPLL – Phase-locked lasers
  • Opto-Electronic Oscillators
  • Ideal for rapid prototyping

Overview

The SMC-Series modules are the ideal instruments for controlling the current and the temperature of diodes laser for AMO physics. With an ultra-low current noise density  15pA/√Hz (SMC11) and sub-mK thermal control stability (SMC20 & SMC31), the SMC-Series is the right choice for the most demanding applications.

Because SMC-Series was first designed for frequency stabilization and OPLL applications, the SMC20 temperature controller provides both high-stability and analog setpoint control features to maintain a laser lock continuously. The SMC20 presents a typical stability less than 1mK/°C with respect to room temperature, and has a temperature control range from 17°C to 31°C.

When the temperature controller is used with the SMC31 TEC Driver, two modes of operation are supported: constant temperature mode (CT) and constant current mode (CC). A laser frequency control application normally operates in CT mode. In this case, the laser is temperature-tight controlled using a high-resolution thermistor bridge and an analog PID controller. The CC mode operates the TEC at fixed current, which is set using front panel trimmer or analog control. Because laser diodes usually come with
integrated TEC and such sensor, only 10-kΩ NTC thermistors are supported.

Like all SM-Series modules, the SMC20 is shipped with the schematic diagrams of its electronic circuitry providing all required information for advanced users.

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Additional Views

Front panel not shown

SMC10 – Low-Noise Current Source

Uncategorized
This module is now replaced with the SMC11 (web page) which provides higher performance.

Features

  • Ultra low-noise current
  • 0 to 200mA current source
  • Adjustable current limiter
  • 1-mA/V servo modulation input
  • RF modulation input
  • Slow turn-on
  • Analog design – free of digital noise
  • EMI noise immunity

SMC10 Low-Noise Current source

Applications

  • For use with grounded cathode diodes laser
  • Laser frequency stabilization
  • Opto-Electronic Oscillator
  • OPLL – Phase-locked lasers
  • Ideal for rapid prototyping

Overview

The SMC-Series modules are the ideal instruments for controlling the current and the temperature of diodes laser in AMO physics. With an  ultra-low current noise density  of 100 pA/√Hz (SMC10) and sub-mK thermal control stability (SMC20 & SMC31), the SMC-Series is the right choice for the most demanding applications.
Because SMC-Series was first designed for frequency stabilization and OPLL applications, the SMC10 current source provides both Servo and RF inputs for current modulation over large bandwidths. Its ultra-low noise current feature is a key parameter for achieving the best phase noise performance of your stabilized lasers. Using the SMC-Series laser diode controller with the SMA- or SMB-Series modules, complete turn-key solutions are available for your laser frequency stabilizations or phase-locked lasers.

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SMC10 Low Noise Current Source PSD

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