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Model GL-303 Frequency Doubler

Also applicable to the PL-F2X

CONTENTS

1

GENERAL

Controls

Optical Schematic

2

OPERATION

Initial Setup

Operation

3

SERVICE

Maintenance

Factory Service

 

 

 

 

 

GENERAL

Controls

The GL-303 Frequency Doubler has only two operational controls: wavelength selection and aperture.

The wavelength is adjusted manually with the digital readout control. Turn the knob to select the wavelength.

The aperture is opened and closed using the sliding shutter. It is open when the slider is pushed toward the body of the laser, and closed when it is pulled out.

GL-303 Dimensions and Controls.

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Optical Schematic

GL-303 Optical Schematic.

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OPERATION

Initial Setup

  1. Be sure the GL-3300/GL-302 Nitrogen/Dye Laser system is off.

  2. Physically position the GL-303 Frequency Doubler flush against the face of the GL-302 Dye Laser such that their cabinet profiles match and the black bands align.

  3. The lid of the GL-303 is hinged to swing back. Open the lid and carefully place the desired filters into their holders.

    NOTE: Do not touch the windows of the crystal cell or any of the optics. Fingerprints can distort the laser beam and adversely affect performance.

  4. Close the lid of the GL-303.

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Operation

CAUTION: Always use appropriate laser safety goggles when operating the frequency doubler. Avoid direct exposure to the beam.

 

Although the GL-303 is a highly sophisticated frequency doubler, it is extremely easy and safe to use. The frequency doubler consists of an optically non-linear crystal mounted in a precisely adjustable angle tuner. For efficient operation, the angle tuner must be adjusted to maximize the output power at each wavelength. Optical filters are placed in the filter holder to remove the fundamental wavelength for each dye and any super-radiance from the dye laser.

WARNING: Under no circumstances is it recommended or required to operate the GL-303 with the lid raised. Eye injury can result because the surfaces of the quartz crystal cell can reflect a portion of the laser beam out of the compartment. Close the lid of the GL-303 before restarting the GL-3300 or opening its shutter.

 

  1. From the calibration report, select or interpolate to find the desired dial setting for the GL-303.

  2. Select the desired dial setting on the GL-303.

  3. Start the GL-3300, following the instructions.

  4. Open the shutters of the GL-3300, GL-302 and GL-303.

Interpolation from the calibration report is only approximate. The exact angle depends on temperature and even on the flatness of the bench. Therefore, more precise adjustments to the dial setting must be made using a white business card to observe the emission and adjusting the dial setting to obtain a maximum.

The above initial setup should be sufficient to produce an output beam. Small transverse adjustments of the frequency doubler with respect to the dye laser can then be used to further optimize the power.

The GL-303 can be used to pass the dye laser beam without doubling its frequency. To do this, remove the filters from the GL-303 and detune it (change the dial setting away from that which doubles the frequency of the dye laser).

Once the GL-303 is optimized for frequency doubling, it may be removed to use the beam directly from the dye laser. To put the GL-303 back in its place requires realigning the endplates of the dye laser and doubler (flush against each other, profiles matching). Small transverse adjustments of the frequency doubler with respect to the dye laser can then be used to optimize the power.

NOTE: All of the components in the GL-303 are manufactured, assembled and aligned to exacting standards, and locked securely in place before shipment. Under no circumstances should any of these components be unlocked and/or adjusted without the express consent of a PTI Service Engineer.

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SERVICE

Maintenance

The GL-303 will deliver trouble-free, reliable performance in part because of the virtual absence of maintenance requirements. Occasionally remove and clean the filters with lens tissue moistened with methanol. If the quartz windows of the crystal cell appear to be dusty, remove the baffle above the crystal cell, wipe the windows of the crystal cell with lens tissue moistened with methanol, and replace the baffle.

NOTE: Clean the windows in place. Do not remove or adjust the crystal cell.

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Factory Service

Photon Technology International has designed the GL-303 to provide years of dependable operation. If for any reason the unit is not performing to your satisfaction, do not hesitate to call PTI for assistance. Most problems can be resolved over the phone.

In the rare instance your frequency doubler requires more than routine service, replacement parts and service support can usually be obtained by phone. We will need a purchase order for any replacement parts you require.

It is extremely rare that a frequency doubler or any of its components must be shipped back to PTI for service. However, if such service is required, you must obtain an R.A. (Return Authorization) number from PTI before shipment. No items will be accepted at the plant without an R.A. number.

We listen to our customers. While we feel that we have developed the most advanced frequency doubler available, we are open to your suggestions. Please feel free to contact PTI.

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