Category Archives: SMB-Series Optical Phase-Locked Loop

SR21 – OPLL Locking Electronics and Laser Controllers

This configuration includes:

  • SR20 OPLL – Locking Electronics (x1)
  • SR30 Laser Diode Controller (x2)
  • For optional 3U/19″ enclosure, refer to XXX.
  • For optional 3U/19″ powered enclosure, refer to XXX.
  • For optional laser diodes drivers (slave and master), refer to XXX.
  • from
  • Low-noise +24V/+15V/-15V/+5V power supplies
  • High EMI immunity
  • Shielded 3U-19″ enclosure ( (42HP and 63HP widths are also available)
  • All schematics and C sources files included
  • from 4500 EUR

SR200 Cévennes- OPLL Locking Electronics

Configuration

Contact Sisyph

Specifications

Front-Panel

  • 6 modules
  • Occupied width: 24HP (6x4HP)

Options

See Also

SMB00 – Power Interface

Features

  • Reverse polarity protectionSMB00 Module
  • In-rush current limitation
  • Undervoltage monitoring
  • High-frequency noise filtering
  • Schematics included

Contact Sisyph

Overview

SMB-Series is a dedicated modular instrumentation for Optical Phase-Locked Loop applications. The SMB-Series modules are designed to operate from several DC-power supplies. Each module has two 50-pin stack-through headers acting as a power bus when several boards are stacked. SMB00 is the interface board used to connect the supply sources to the power bus.
In order to ensure a safe and reliable operation when the stack is powered-up, the SMB00 provides protections against accidental reverse voltage connections and in-rush current limitations. An L-C tank filter is also provided for high-frequency noise suppression. Under-voltage levels are detected by a monitoring circuit that signals a power fault condition both using leds on the front panel and an open-collector digital output.

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SMB30 – Piezo Compensator

Features

  • For use in OPLLSM_B30_SG02_R15A_piezo_compensator_pictures
  • Parallel PID
  • Nested or bypass topology
  • Feedforward and ramp inputs
  • Loop polarity selector
  • DC-voltage control of the P-action
  • Presettable integrator
  • Straightforward interface
  • Additional loop-shaping stage
  • Pure analog processing – free of digital noise
  • EMI noise immunity
  • Schematic diagrams included
  • Ideal for rapid prototyping

Contact Sisyph

Overview

The SMB30 module is an electronic board for use in Optical Phase-Locked Loop (OPLL) applications where the frequency detuning between two laser sources requires tight and quick control.
This board is a PID compensator designed for the piezo actuator of the laser source. In such applications, the low-frequency path is used to desaturate the high-speed loop that controls the fast frequency actuator over a wide bandwidth. The SMA30 is designed to work with the RF Frequency Mixer (SMA10) and High-Speed Compensator (SMA20)  modules. While the SMA30 output is able to drive low-voltage capacitive loads, an external piezo driver may be required for high-voltage actuators.
The SMA30 module gives a complete control of the loop filter operation for most demanding users. All analog inputs use differential pairs to avoid ground-loops. The loop polarity is set using a remote control or a local switch and the loop gain is adjusted over 80 dB using either a front panel trimmer or a DC-voltage. For lock-acquisition purposes, the integrator output of the PID can be precisely controlled by the user. A ramp input is provided to sweep the frequency during the open-loop operation and a feedforward input offers a useful control of the fast actuator such as frequency jumps or closed-loop measurements. Additional filter and equalizer stages allow the designer to shape the loop gain more acurately when low-frequency resonances of the piezo actuator can lead to closed-loop oscillations.
Like all SM-Series modules, the SMA30 is shipped with the schematic diagrams of its  electronic circuitry providing all required information for advanced users.

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See also

SMB20 – High-Speed Compensator

Features

  • For use in OPLL
  • High-speed parallel PID
  • Two extra integrators for PI3D action
  • Feedforward and ramp inputs
  • Error polarity selector
  • DC-voltage controlled loop-gain
  • Presettable integrator
  • Straightforward interface
  • Pure analog processing – free of digital noise
  • EMI noise immunity
  • Schematic diagrams included
  • Ideal for rapid prototyping

Contact Sisyph

Overview

The SMB20 module is an electronic board for use in Optical Phase-Locked Loop (OPLL) applications where the frequency detuning between two laser sources requires tight and quick control.
This board is recommended to process the offset frequency error signal coming from the Phase/Frequency Discriminator module (SMB10). Designed for the high-speed path of the control loop, its output signal is intended to drive the fast frequency actuator device (the slave laser diode in OPLL). In order to avoid saturation of the high-speed loop, a low-frequency path using a piezoelectric actuator may be required (see SMB30 module).
The SMB20 module offers a high performance compensator for the designers allowing a complete control of the loop filter operation. The polarity of the error signal is set either on board or using remote control. The loop gain is adjusted over more than 60 dB using the front panel trimmer or a DC-voltage. The length of the high-speed PID has been minimized while two additional integrator stages can boost the loop gain at low frequency. For  lock-acquisition purposes, the integrator output of the fast PID can be precisely controlled by the user. A ramp input is provided to sweep the laser frequency during the open-loop operation while the feedforward input offers a useful control of the fast actuator for frequency jumps or closed-loop measurements.
Like all SM-Series modules, the SMB20 is shipped with the schematic diagrams of its electronic circuitry, providing all required information for advanced users.

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See also

SMB10 – Phase-Frequency Discriminator

Features

  • Beat-note input
    • frequency range: 10 MHz to 400 MHz
    • level: -20 dBm to -6 dBm @ 400MHz
  • Synchronization input
    • frequency range: 10 MHz to 400 MHzsmb10_sg02_r16a
    • level: 0 dBm @ 100MHz
  • Prescaler divide ratio
    • N = 2, 4, 8
    • N = 10, 20, 40, 80 (optional)
    • N = 1 (optional)
  • Phase error monitor
  • Lock-detect signal
  • Beat-note monitor
  • Schematics included
  • Ideal for rapid prototyping

Contact Sisyph

 

Overview

SMB-Series is a dedicated modular instrumentation for optical phase-locked loop applications. Among these modules, SMB10 is intended to generate the phase-frequency error signal.

Like all SM-Series modules, the SMB10 is shipped with the schematic diagrams of its electronic circuitry, providing all required information for advanced users.

Download

See also