1. Brian D. Goldberg

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    1. Mentioned In 16 Articles

    2. Long-to-short wavelength swept source

      Long-to-short wavelength swept source
      Most swept external cavity diode lasers tune in the short-to-long wavelength direction (red tuning). Lower relative intensity noise (RIN) and higher output power are typically possible in this direction. We show here that long-to-short tuning (blue tuning) is possible for a short, linear cavity laser that has both low noise and high power. This mode of operation is made possible by nonlinear frequency broadening in the semiconductor optical amplifier (SOA ...
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    3. Process Engineer in MEMs and Micro-Optical Device Fabrication at Axsun Technologies

      Process Engineer in MEMs and Micro-Optical Device Fabrication at Axsun Technologies
      Job Summary Reporting into Manufacturing but working closely with Design Engineering the individual filling this role is responsible for understanding performance factors and reliability of our proprietary MEMS tunable filter and passive micro-optics as they relate to fabrication processes and various elements of design. The scope of responsibility centers on device fabrication (MEMs or semiconductor processing familiarity) and characterization (understanding metrology and testing) along with data tracking analysis and recommendations ...
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    4. Senior Product Engineer Swept Source Engines at Axsun Technologies

      Senior Product Engineer Swept Source Engines at Axsun Technologies
      Job Summary In this role you will make vital contributions to our cutting-edge products in the rapidly growing field of Optical Coherence Tomography Medical Imaging for ophthalmology, cardiology, dermatology, and cancer detection. Responsibilities Monitor and troubleshoot performance and yield of Axsuns growing line of swept-source optical engines through the production line. Perform data analysis, compare numerical predictions and experimental results, present findings and review results and trends with the Engineering ...
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    5. Senior Systems Engineer in Swept Source Engines at Axsun Technologies

      Senior Systems Engineer in Swept Source Engines at Axsun Technologies
      Job Summary In this role you will make vital contributions to our cutting-edge products in the rapidly growing field of Optical Coherence Tomography Medical Imaging for ophthalmology, cardiology, dermatology, and cancer detection. Responsibilities Analysis and design of complex optical, electro-mechanical systems with a focus on swept source engines for Optical Coherence Tomography (OCT) Develop and demonstrate feasibility of novel concepts in swept lasers, OCT, and related optical imaging technologies Work ...
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    6. Coherence properties of short cavity swept lasers

      Coherence properties of short cavity swept lasers
      It has been shown theoretically and experimentally that short cavity swept lasers are passively mode locked. We develop a mathematical model of these lasers and the light field solutions are used to predict the coherence length and coherence revival behavior. The calculations compare favorably with data from a 9901100 nm laser swept at 100 kHz suitable for optical coherence tomography applications.
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    7. Optical teardown of a Kindle Paperwhite display by OCT.

      Optical teardown of a Kindle Paperwhite display by OCT.
      An optical teardown, or reverse engineering, of an Amazon Kindle Paperwhite electrophoretic display was performed by Optical Coherence Tomography at 1060 nm. The display incorporates an optical diffuser, lightguide and scattering layers for white light illumination, capacitive touch sensing, and an electrophoretic display. All these layers can be imaged by OCT as well as the thin film transistor array on the back side for driving the pixels. Phase sensitive OCT ...
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    8. SNR of swept SLEDs and swept lasers for OCT

      SNR of swept SLEDs and swept lasers for OCT
      A back-to-back comparison of a tunable narrow-band-filtered SLED (TSLED) and a swept laser are made for OCT applications. The two sources are similar in terms of sweep speed, tuning range and coherence length. A fundamental issue with a TSLED is that the RIN is proportional to 1/linewidth, meaning that the longer the coherence length, the higher the RIN and clock jitter. We show that the TSLED has an SNR ...
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    9. Spectral filtering of k-clock signal in OCT system and method

      Spectral filtering of k-clock signal in OCT system and method
      A system and method for spectral filtering of a k-clock signal in a swept-source Optical Coherence Tomography ("OCT") system to remove artifacts in the k-clock signal. The system synchronizes sampling of the k-clock and interference signals generated from scanning a sample. Using a filtered k-clock signal, the system resamples an interference dataset of the interference signals. The system then performs Fourier transform based processing upon the resampled interference dataset to ...
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    10. Multi-speed OCT swept source with optimized k-clock

      Multi-speed OCT swept source with optimized k-clock
      An optical coherence tomography system utilizes an optical swept source that frequency scans at least two different sweep rates. In this way, the system can perform large depth scans of the sample and then the same system can perform shorter depth high precision scans, in one specific example. In order to optimally use the analog to digital converter that samples the interference signal, the system further samples the interference signals ...
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    11. System Method For Resampling Optical Coherence Tomography Signals In Segments

      System Method For Resampling Optical Coherence Tomography Signals In Segments
      A system and method for resampling interference datasets of samples in segments, in a swept- source based Optical Coherence Tomography (OCT) system. The resampling is preferably performed within a Field Programmable Gate Array (FPGA) of the OCT system, the FPGA preferably having Fourier-transform based signal processing capabilities such as Fast Fourier Transform (FFT) cores. Resampling the interference datasets in segments provides a flexible approach to resampling that makes efficient use ...
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    12. Feature Of The Week 4/26/2015: Optical Teardown of a Kindle Paperwhite Display by OCT

      Feature Of The Week 4/26/2015: Optical Teardown of a Kindle Paperwhite Display by OCT
      The Amazon Kindle Paperwhite is an advanced electronic book reader that features a black and white electrophoretic display as well as capacitive multitouch screen capability and an internal lightguide with an optical scattering layer to provide uniform, white light illumination. Teardowns, where a new electronic gadget is disassembled and photographed are commonly found on technically oriented web sites. Here we perform an optical teardown of the first generation Kindle Paperwhite ...
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    13. Analysis of a spinning polygon wavelength swept laser

      Analysis of a spinning polygon wavelength swept laser
      It has been known for quite some time that spinning polygon, and similar, swept lasers used in OCT favor the short to long wavelength sweep direction because of four wave mixing in the gain medium. Here we have reformulated the problem in the time domain and show experimentally and through numerical simulation that these lasers are pulsed. The emitted pulses modulate the gain medium refractive index to red shift the ...
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    14. MULTI-SPEED OCT Swept Source With Optimized K-CLOCK

      MULTI-SPEED OCT Swept Source With Optimized K-CLOCK
      An optical coherence tomography system utilizes an optical swept source that frequency scans at least two different sweep rates. In this way, the system can perform large depth scans of the sample and then the same system can perform shorter depth high precision scans, in one specific example.
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    15. An optical smart needle : point-of-care technologies for integrated needle guidance using optical frequency domain ranging (Thesis)

      An optical smart needle : point-of-care technologies for integrated needle guidance using optical frequency domain ranging (Thesis)
      Obtaining accurate needle placement is of critical importance in many medical scenarios. In the setting of fine needle aspiration biopsy (FNAB), manual palpation is often the only cue for determining the optimal position of the needle. As a result, FNAB procedures frequently yield non-diagnostic tissue. When not guided by an imaging modality, breast and thyroid FNAB's only obtain diagnostic tissue in approximately 65% of cases. Although the addition of ...
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  2. About Brian D. Goldberg

    Brian D. Goldberg is a Principal Systems Engineer at Axsun Technologies.