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APD Controller Fabrication and Integration


National Eye Institute / National Institute of Health


Announcement/Number:  EE20-1473

Post Date: December 16, 2019

Closing Response Date: December 26, 2019

Proposed Award Date: December 30, 2019

Project Title: APD Controller Fabrication and Integration

Contracting Office: National Eye Institute, Building 31, Room 6A52

Contact Point/Contracting Officer/Contract Specialist: Elaine Estrella,

North American Classification System (NAICS) Code (include): 333314

Size Standard: 500

Classification Code: Optical Instrument and Lens Manufacturing

Offerors must quote on all items to be eligible for award. The Government will award a contract resulting from this solicitation to the responsible offeror whose offer conforming to the solicitation.



The National Eye Institute (NEI) is in the process of designing and implementing a next generation adaptive optics scanning light ophthalmoscope. A custom Avalanche Photodiode (APD) controller is needed to detect light used for retinal imaging in order to capture detailed images of cells in patients' eyes. An existing custom-built APD controller is currently being used in an existing adaptive optics scanning light ophthalmoscope. Additional detection channels that replicate the specifications of this existing custom-built controller are needed in order to expand and replicate existing imaging studies, which include longitudinal measurements. This custom APD controller satisfies these requirements and will be needed in order to allow NEI to carry out current and planned advanced retinal imaging studies.

APD devices are unlike most other detectors in that they are typically not "plug and play". This means that the procurement of an APD by itself is not very useful without having an electronics solution in place to amplify the signal and to control the temperature. The design of these electronics solutions is highly dependent on the application.





APD Controller Fabrication and Integration includes:
- 4-channel APD high voltage and temperature controller

 Qty. HV gain channels: 4 (independently controlled)

 HV control interface: USB 2.0

 HV range: 0-425V

 Qty. temp. control channels: 4 (independently controlled),

cooling only

 Temperature controller: Red Lion PXU41A20 (1 per channel)

 Controller box size: 13” X 17” X 3.5” (2U rack amount chassis)


- 4 APD devices included

 Part number : Excilitas C30659-900-R8AH,

 Si APD with spectral response from 400 to 1100nm

 Active sensor diameter: 0.8mm

 Active sensor area: 0.5mm^2

 System bandwidth: 50MHz


- Cables Included

 75Ohm BNC signal cable, 6ft long (4X)

 Custom APD LV control cable, 6ft long (4X)

 50Ohm BNC HV cable, 6ft long (4X)



Contractor Requirement:

Contractor must have the unit tested and validated for use that is compatible with the existing government furnished adaptive optics scanning light ophthalmoscopes.


Government Responsibilities:

Government will provide access to government unit to allow contractor to perform testing and validation. Government will inspect unit after receipt to ensure validation, acceptance and testing are satisfactory.



Payment will be made 30 days after internal receiving in NIH system.


 AWARD TYPE       

Firm Fixed



Proposal must be exact, and substitution cannot be accepted. 



A single module with a custom temperature controller incorporating an Excelitas C30659-900-R8AH APD is currently in use in the adaptive optics instrument in the NEI eye clinic. Additional modules are needed to extend experimental results and it is imperative that the exact same component be replicated. The physical dimensions of the new unit needs to fit within a 2U rack mount chassis and the APD component that is utilized must exactly match the specifications of the C30659-900-R8AH, which is a Si APD with spectral response from 400-1100 nm. The custom high voltage supply must be able to supply a voltage range of 0 to 425 Volts. A temperature controller (specified as Red Lion PXU41A20, 1 per channel) must be incorporated into the APD design as previously described for custom built adaptive optics scanning light ophthalmoscopes. Finally, the component must have been designed for an validated for use in a custom built adaptive optics scanning light ophthalmoscope. There is no other manufacturer that can provide a replica of the custom-designed circuit and detector that we need. We must use the Boston Micromachines solution which is only available directly from the manufacturer in order to avoid the introduction of new variables and to avoid long delays resulting from retesting of products from other potential suppliers. Data available is not adequate to assure that these parts, if procured from another manufacturer, will perform the same function in the equipment/system as the parts to be replaced. Further, drawings or specifications sufficient to obtain competition are not available.


Closing Statement: This notice is not a request for competitive proposals.  However, interested parties may identify their interest and capability to respond to this notice.  Responses to this notice shall contain sufficient information to establish the interested parties’ bona-fide capabilities for fulfilling the requirement and include: unit price, list price, shipping and handling costs, the delivery period after contract award, the prompt payment discount terms, the F.O.B. Point (Destination or Origin), the Dun & Bradstreet Number (DUNS), the Taxpayer Identification Number (TIN), and the certification of business size. All offerors must have an active registration in the System for Award Management (SAM)

A determination by the Government not to compete this proposed action based upon responses to this notice is solely within the discretion of the Government. The information received will normally be considered solely for the purposes of determining whether to proceed on a non-competitive basis or to conduct a competitive procurement.

All responses must be received by December 26, 2019 and must reference number EE20-1473.  Responses may be submitted electronically to or hand delivered in person. Fax responses will not be accepted.


“All responsible sources may submit a bid, proposal, or quotation which shall be considered by the agency.”



Last updated: December 16, 2019