SATPC0038788 Tab 06 RDSS..pdf

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NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

NASA SHARED SERVICES CENTER

RECOMMENDATION AND DETERMINATION TO SOLICIT FROM ONE SOURCE

OR BRAND NAME

PICK ONE

Sole Source:

☒I recommend that NASA, NASA Shared Services Center negotiate with Lumibird only for Quantel Laser SHG/THG unit. The total estimated cost of this effort is and the estimated period of performance or lead-time for delivery is 30 days ARO.

OR

Brand Name Justification:

☐I recommend that NASA, NASA Shared Services Center negotiate only with vendors who can provide the subject band name from . for Enter Supply or Service to be procured. The total estimated cost of this effort is Enter Dollar amount and the estimated period of performance or lead-time for delivery is Date.

This recommendation is for the acquisition of supplies or services determined to be reasonably available from only one source/only one manufacture. Competition is impractical for the following reasons (please answer the questions below):

1. What are the reasons for soliciting only the suggested source/suggested brand name? Please provide the unique characteristics of the items or services along with the supporting rationale and the market research performed to substantiate your reason for the suggested source/brand name.

NASA Langley has previously acquired a compact Nd:YAG-pumped dye laser system from Lumibird, capable of producing tunable, high-energy, nanosecond laser pulses in the yellow and red wavelengths.

This system remains operational. Currently, NASA projects require measurement techniques that utilize tunable, high-energy, nanosecond laser light in the ultraviolet (UV) spectrum, necessitating an upgrade to the existing system to enable UV laser output. This procurement from Lumibird is for a robust and compact combined second harmonic generation (SHG) and third harmonic generation (THG) unit designed for direct integration with the existing Lumibird Q-Scan Dye Laser. The unit must be compatible with existing control software. The SHG/THG system’s characteristics are highly specialized due to its integrated design with the existing NASA Langley Q-Scan Dye Laser and the stringent performance standards required for operation at large-scale NASA facilities.The SHG/THG unit must accommodate both second and third harmonic nonlinear crystals and be fully integrated with the control software for the Q-Scan Dye Laser, including an embedded look-up table for crystal positioning during wavelength scanning. The system should deliver a THG energy greater than 3 mJ at 10 Hz at wavelengths of 205–225 nm when operating with red dye and pumped by the Q-Smart 850. Similarly, it should provide an SHG energy exceeding 20 mJ at 10 Hz within the 280–284 nm range when operating with yellow dye pumped by Q-Smart 850.Additional system requirements include:1) An integrated compensator optic to correct for beam deviation during wavelength and crystal position scanning,2) An integrated residual laser beam separator and dump,3) UV pulse duration not exceeding 10 ns for efficient atomic and molecular excitation,4) Beam divergence less than 0.5 mrad to maintain beam quality over long distances,5) Beam pointing stability within 50 µrad based on a minimum of 200 laser shots.Furthermore, the system must meet size and weight constraints (dimensions within 0.8 m x 0.6 m x

0.3 m and weight not exceeding 110 kg), operate on single-phase 110 VAC, 60 Hz power, and function within an ambient temperature range of 18 °C to 28 °C. These specifications are critical to enable installation at designated NASA ground test facilities with minimal modifications.

2. What is the impact to the government if another vendor/brand is used? Include any dollar, schedule, or compatibility impacts if possible.

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No other company has developed a combined second harmonic generation (SHG) and third harmonic generation (THG) unit that can be directly integrated with the Lumibird Q-Scan Dye Laser, including compatibility with existing control software. Utilizing an alternative vendor or brand would substantially reduce the system’s overall utility and effectiveness. For example, integration of the SHG/THG unit with the dye laser software is crucial for enabling computer-controlled rotation of the nonlinear crystal based on the dye laser wavelength. Inability to reliably perform this function could diminish measurement performance and limit the potential data outputs for NASA projects. Additionally, opting for a different laser system may compromise measurement quality due to lower pulse energy, inferior beam quality, reduced energy stability, or greater power drift in the UV laser. The lightweight design of this system is also vital for ground test environments with weight restrictions, while its high pulse energy and extensive UV tunability are essential for the diverse applications at large-scale NASA ground test facilities.

Selecting an alternative SHG/THG unit would likely lead to significant cost and schedule impacts, including the need for a larger optical table, potential building modifications such as floor reinforcements to support increased weight, or electrical system adjustments to meet different power requirements.

ADDITIONAL COMMENTS:

Technical User Name Date

Title

Office