BNC PCO-6131 Operating Manual
  1. Manuals
  2. Brands
  3. BNC Manuals
  4. Control Unit
  5. PCO-6131
  6. Operating manual

BNC PCO-6131 Operating Manual

Laser diode driver module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
PCO-6131
Laser Diode Driver Module
Operating Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PCO-6131 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for BNC PCO-6131

Summary of Contents for BNC PCO-6131

  • Page 1 PCO-6131 Laser Diode Driver Module Operating Manual...
  • Page 2 Berkeley Nucleonics Corporation 2955 Kerner Blvd., San Rafael, CA 94901 ° Tel (415) 453 9955 ° Fax (415) 453 9956 ° ww.berkeleynucleonics.com...

  • Page 3: Table Of Contents

    Berkeley Nucleonics Corporation TABLE OF CONTENTS 1.0 Safety ......................0 2.0 Overview .....................1 3.0 System Requirements .................2 4.0 Connector Pin-Outs And User Adjustments ..........2 5.0 Operating Instructions .................5 5.1 Output Stripline .................5 5.2 Load Interconnection .................5 5.3 Gate Input ..................6 5.4 Enable Input ..................6 5.5 Output Current Setpoint Monitor ............6 5.6 Internal and External Current Setpoint ..........7 5.7 Leading Edge Risetime Control Potentiometer .........7...

  • Page 4: Safety

    Berkeley Nucleonics Corporation (BNC) provides information on its products and associated hazards, but it assumes no responsibility for the after-sale operation...

  • Page 5: Overview

    Berkeley Nucleonics Corporation 2.0 Overview The PCO-6131 is a compact, OEM-style high power pulsed current source designed to drive diode lasers, bars and arrays in pulsed, QCW or CW modes. It delivers output current variable from 1 A to 125 A, pulse widths variable from <100 ns to DC, and pulse repetition frequencies variable from single-shot to 500 KHz at duty cycles up to 100%.

  • Page 6: System Requirements

    PCO-6131 may induce ringing on the leading edge of the pulse. The rise time may be slowed down using the variable rise time control to minimize or eliminate this ringing.
  • Page 7 Berkeley Nucleonics Corporation 008 or equivalent. The sockets for use with this housing are FCI Connector part number 48236-000 or equivalent. A housing connector and sockets are included with the PCO-6131. The pin-out of this connector follows: Pin Number Description...
  • Page 8 Berkeley Nucleonics Corporation These connectors are shown in the photo below: E2 AND E3 J2 PIN1 E1 AND E4 Figure 1: Connectors J2, E1, E2, E3 and E4 Locations The Output current is set by the Current Set potentiometer, located on the edge of the smaller logic circuit board.

  • Page 9: Operating Instructions

    5.1 Output Stripline The PCO-6131 is provided with a low impedance output stripline cable. The laser diode should always be connected to the driver using this stripline cable. Wire or twisted pair are too inductive and may seriously degrade the fidelity of the output current waveform.

  • Page 10: Gate Input

    5.3 Gate Input An input gate of +5 V ±1 V (CMOS) is required to gate on the PCO-6131. Departure from these values can result in a loss of performance. This trigger requirement is met by any high-quality low voltage pulse generator.

  • Page 11: Internal And External Current Setpoint

    PCO-6131 may induce ringing on the leading edge of the pulse. The rise time may be slowed down using the variable rise time control to minimize or eliminate this ringing.

  • Page 12: 24Vdc Input

    5.10 Power-Up Procedures 1. The unit should be powered up using the following procedures: 2. Before connecting the input pulse generator to the PCO-6131 pulser, set up the pulse generator output to deliver a CMOS level pulse with a repetition rate and pulse width appropriate for the laser diode being driven.

  • Page 13: Power-Down Procedures

    The output pulse current may be monitor using the optional PCA-9155. Scaling is 1000 A/V into 50 Ohms. 16. If there is no output from the PCO-6131, or the output is severely distorted, disable the output, and turn OFF the +24 VDC power supply. Leave the PCO-...

  • Page 14: Laser Diode Interconnection Inductance

    A stripline is very integral to obtaining good fidelity of current pulses. The strip line shown in the figures in this note is the stripline supplied with the PCO-6131 and is available from BNC.
  • Page 15 Berkeley Nucleonics Corporation Figure 3 - Test Setup Figure 4 and 5 show how the output stripline was connected to the laser diode for the first set of tests. In Figure 4, the stripline was intentionally separated to show connections. Normally it is best if the stripline conductors are closely coupled to each other to minimize inductance.
  • Page 16 Using this interconnection, at 50 A output the following electrical performance was measured. For all photos, the top trace is the input gate to the PCO-6131, and the bottom trace is the output current pulse measured with the PCO-6131’s current monitor.
  • Page 17 Figure 8 - 10 Microsecond Pulse Width 550 ns Fall Time, 67 ns Rise Time Using a Stripline We then connected the laser diode to the PCO-6131 output stripline using approximately 6 inches of wire. Ring lugs were used to attach the wires to the laser diode, and the other ends of the wires were soldered to the ends of the striplines.
  • Page 18 Using this interconnection, at 50 A output the following electrical performance was measured. For all photos, the top trace is the input gate to the PCO-6131, and the bottom trace is the output current pulse measured with the PCO-6131’s current monitor.

  • Page 19: Troubleshooting

    Berkeley Nucleonics Corporation Figure 12 - 5 Microsecond Pulse Width – Wire Interconnection 4.3 Microsecond Fall Time, 454 ns Rise Time As can be seen from the data above, even the inductance of 6 inches of wire in the connection between the stripline and the laser diode can result in a 5X to 8X degradation in the rise time and fall time.

  • Page 20: Troubleshooting Procedures

    Berkeley Nucleonics Corporation 7.1 Troubleshooting Procedures The table below summarizes potential problems and their solutions. If these recommendations do not resolve the problem, BNC customer service can be contacted for further assistance. SYMPTOM SOLUTIONS No output pulse • No input gate •...

  • Page 21: Warranty

    BNC’s sole obligation, and buyer’s sole remedies, under this agreement shall be limited to a refund of the purchase price, or at BNC’s sole discretion, to the repair or replacement of products in kind that prove, to BNC’s satisfaction, to be defective, when returned to the BNC factory, transportation prepaid by the buyer, within the warranty period.

Table of Contents