“I had the pleasure of having Nikola as a teaching assistant in one of my undergraduate classes as well as my mentor during my graduate studies. His desire to help people and attention to detail were one of the main reasons I decided to work with him in graduate school. He goes to great lengths to make sure his explanations are complete and understood. Many engineers throw out an idea without much thought into its feasibility or process for execution, but Nikola always has ideas prepared with a complete battle plan for successful implementation. On top of his hard working and detailed personality he also is extremely knowledgeable about the area he's working in and a very fast learner. I can't really recall any questions I had that he couldn't answer in great detail; he is also able to learn and implement new concepts such as HFSS on his own in a very short amount of time. I would recommend Nikola for any R&D or management position. Not only does he make a great leader, but he excels any team that he is a part of. ”
Nikola Stan
Fort Lauderdale, Florida, United States
883 followers
500+ connections
About
Lead electrical engineer at Magic Leap. 6DOF tracking. Depth sensing. Hardware design…
Contributions
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Here's how you can develop the key attributes of a creative optical engineer.
Agreed, one thing I could add is that besides reading about the latest scientific work, observation of nature around you can be as inspiring. The core principles of how things work in the world around us can inspire us to carry-over a principle and solutions from other disciplines to optical engineering domain, sometimes converting a hard-to-solve problem to a set of few easier-to-solve problems.
Activity
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Diese Woche war unglaublich 😃: Unter dem Motto „Zeitenwende in der nationalen Sicherheit – Resilienz durch disruptive digitale Lösungen“ durften…
Diese Woche war unglaublich 😃: Unter dem Motto „Zeitenwende in der nationalen Sicherheit – Resilienz durch disruptive digitale Lösungen“ durften…
Liked by Nikola Stan
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Good work life = Working with good people And these two are at the top. I've learned so much from Richie Norton that I've applied right into my…
Good work life = Working with good people And these two are at the top. I've learned so much from Richie Norton that I've applied right into my…
Liked by Nikola Stan
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Congrats to Doublepoint #AWE2024 Booth 544 on the launch of WowMouse AR for Magic Leap 2 at this week's AWE 2024 - the first wrist-worn gesture…
Congrats to Doublepoint #AWE2024 Booth 544 on the launch of WowMouse AR for Magic Leap 2 at this week's AWE 2024 - the first wrist-worn gesture…
Liked by Nikola Stan
Experience
Education
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Brigham Young University, Provo, Utah
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Activities and Societies: Presented at SPIE conference for NDE/SHM in 2012, 2013, 2014.
Getting a PhD degree in Electrical Engineering with research in the field of optical fiber sensors, specifically strain sensor (Fiber Bragg grating) and electric field sensors (Slab-coupled Optical Sensor - SCOS).
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Earned a Bachelors degree with emphasis in nanoelectronics, optoelectronics and laser technology. Classes covered topics in planar processes and design for fabrication of electronic and optoelectronic components with focus on the underlying physical processes, quantum mechanics, sensors and measurements, basic computer architecture, etc.
Licenses & Certifications
Publications
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Non-perturbing voltage measurement in a coaxial cable with slab-coupled optical sensors
Applied Optics
Voltage in a coaxial cable is measured by an electric-field optical fiber sensor exploiting the proportionality of voltage and electric field in a fixed structure. The sensor is inserted in a hole drilled through the dielectric of the RG-218 coaxial cable and sealed with epoxy to displace all air and prevent the adverse effects of charge buildup during high-voltage measurements. It is shown that the presence of the sensor in the coaxial cable does not sig- nificantly increase electrical…
Voltage in a coaxial cable is measured by an electric-field optical fiber sensor exploiting the proportionality of voltage and electric field in a fixed structure. The sensor is inserted in a hole drilled through the dielectric of the RG-218 coaxial cable and sealed with epoxy to displace all air and prevent the adverse effects of charge buildup during high-voltage measurements. It is shown that the presence of the sensor in the coaxial cable does not sig- nificantly increase electrical reflections in the cable. A slab-coupled optical fiber sensor (SCOS) is used for its compact size and dielectric make. The dynamic range of 50 dB is shown experimentally with detection of signals as low as 1 V and up to 157 kV. A low corner of 0.3 Hz is demonstrated and the SCOS is shown to be able to measure 90 ns rise time.
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High electric field measurement using slab coupled optical sensors
Applied Optics
A fiber optic electric field sensor was developed to measure electric field up to 18 MV/m. The sensor uses resonant coupling between an optical fiber and a nonlinear electro-optical crystal. The sensing system uses high dielectric strength materials to eliminate dielectric breakdown. A post-processing nonlinear calibration method is developed that maps voltage change to wavelength shift and then converts the wavelength shift to electric field using the transmission spectrum. The nonlinear…
A fiber optic electric field sensor was developed to measure electric field up to 18 MV/m. The sensor uses resonant coupling between an optical fiber and a nonlinear electro-optical crystal. The sensing system uses high dielectric strength materials to eliminate dielectric breakdown. A post-processing nonlinear calibration method is developed that maps voltage change to wavelength shift and then converts the wavelength shift to electric field using the transmission spectrum. The nonlinear calibration method is compared against the linear method with electric field pulses having magnitudes from 1.5 MV/m to 18 MV/m.
Other authorsSee publication -
High electric field measurement with slab coupled optical sensors using nonlinear calibration
SPIE Proceedings Vol. 9480: Fiber Optic Sensors and Applications XII
We describe the application of SCOS technology in non-intrusive, directional and spatially localized measurements of high electric fields. When measuring electric fields above a certain threshold, SCOS measurement sensitivity starts varying to a great extent and the linear approximation that assumes sensitivity to be constant breaks down. This means that a comprehensive nonlinear calibration method is required for accurate calibration of both low and high electric fields, while linear…
We describe the application of SCOS technology in non-intrusive, directional and spatially localized measurements of high electric fields. When measuring electric fields above a certain threshold, SCOS measurement sensitivity starts varying to a great extent and the linear approximation that assumes sensitivity to be constant breaks down. This means that a comprehensive nonlinear calibration method is required for accurate calibration of both low and high electric fields, while linear calibration can only be accurately applied for low fields. Nonlinear calibration method relies on the knowledge of the variability of sensitivity, while linear calibration relies on approximation of sensitivity with a constant value, which breaks down for high fields. We analyze and compare the two calibration methods by applying them to a same set of measurements. We measure electric field pulses with magnitudes from 1 MV/m to 8.2 MV/m, with sub-300 ns rise time and fall-off time constant of 60 μs. We show that the nonlinear calibration very accurately predicts all measured fields, both high and low, while the linear calibration becomes increasingly inaccurate for fields above 1 MV/m.
Other authorsSee publication -
Increasing dynamic range of a fibre Bragg grating edge-filtering interrogator with a proportional control loop
Measurement Science and Technology
We present a fibre Bragg grating (FBG) interrogator that uses a microcontroller board and a tunable optical filter in a proportional control loop to increase dynamic range and achieve high strain sensitivity. It is an edge-filtering interrogator with added proportional control loop that locks the operating wavelength to the mid-reflection point on the FBG spectrum. The interrogator separates low-frequency (LF) components of strain and measures them with extended dynamic range, while at the same…
We present a fibre Bragg grating (FBG) interrogator that uses a microcontroller board and a tunable optical filter in a proportional control loop to increase dynamic range and achieve high strain sensitivity. It is an edge-filtering interrogator with added proportional control loop that locks the operating wavelength to the mid-reflection point on the FBG spectrum. The interrogator separates low-frequency (LF) components of strain and measures them with extended dynamic range, while at the same time measuring high-frequency (HF) strain without loss in strain sensitivity. In this paper, we describe the implementation of the interrogator and analyse the characteristics of individual components, such as the speed and voltage resolution of the microcontroller and the tunable optical filter. We measure the performance of the proportional control loop at frequencies up to 1 kHz and characterize the system using control theory. We illustrate the limitation of the conventional interrogator to measure strains greater than 40 μepsilon and demonstrate successful application of the proposed interrogator for simultaneous measurement of 450 μepsilon LF strain at 50 Hz superimposed with 32 kHz HF strain.
Other authorsSee publication -
Non-intrusive high voltage measurement using slab coupled optical sensors
Proc. SPIE 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014
We present an optical fiber non-intrusive sensor for measuring high voltage transients. The sensor converts the unknown voltage to electric field, which is then measured using slab-coupled optical fiber sensor (SCOS). Since everything in the sensor except the electrodes is made of dielectric materials and due to the small field sensor size, the sensor is minimally perturbing to the measured voltage. We present the details of the sensor design, which eliminates arcing and minimizes local…
We present an optical fiber non-intrusive sensor for measuring high voltage transients. The sensor converts the unknown voltage to electric field, which is then measured using slab-coupled optical fiber sensor (SCOS). Since everything in the sensor except the electrodes is made of dielectric materials and due to the small field sensor size, the sensor is minimally perturbing to the measured voltage. We present the details of the sensor design, which eliminates arcing and minimizes local dielectric breakdown using Teflon blocks and insulation of the whole structure with transformer oil. The structure has a capacitance of less than 3pF and resistance greater than 10 GΩ. We show the measurement of 66.5 kV pulse with a 32.6μs time constant. The measurement matches the expected value of 67.8 kV with less than 2% error.
Other authorsSee publication -
High dynamic range high sensitivity FBG interrogation
Proc. SPIE 8694, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013, 86940N
We present a fiber Bragg grating (FBG) interrogation method using a micro-controller board and optical filter that achieves high strain sensitivity and high dynamic range. This interrogation method allows high sensitivity detection of ultrasonic waves superimposed on low-frequency (on the order of 100Hz) vibrations of arbitrary magnitude. One possible application is in-situ structural health monitoring of windmill blades exposed to strong winds by using FBG sensors for detection of ultrasonic…
We present a fiber Bragg grating (FBG) interrogation method using a micro-controller board and optical filter that achieves high strain sensitivity and high dynamic range. This interrogation method allows high sensitivity detection of ultrasonic waves superimposed on low-frequency (on the order of 100Hz) vibrations of arbitrary magnitude. One possible application is in-situ structural health monitoring of windmill blades exposed to strong winds by using FBG sensors for detection of ultrasonic waves.
Interrogator operation is based on the edge filtering method using a broadband source, fiber Fabry-Perot filter and a micro-controller board which acts as a control feedback loop that locks the filter wavelength to the mid-reflection point on the FBG spectrum. Wavelength locking method allows high sensitivity for edge filtering of high-frequency waves, while the feedback signal is the measurement of low-frequency vibration with high dynamic range. The concept of the interrogator operation and different implementations are described and discussed with experimental results.Other authorsSee publication -
High-speed full-spectrum interrogation of fiber Bragg grating sensor application in reducing sensor strain sensitivity
Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012
We used high-speed full-spectrum interrogation of a Fiber Bragg Grating (FBG) sensor to measure dynamic strain in different sensor packages in real-time. In this effort we performed solenoid impact tests on a variety of sensor mounting structures made with FR4, steel, and carbon fiber composite materials. Full spectrum FBG interrogation at 40 kHz repetition rate was the key that allowed us to measure and compare dynamic strain in the structures, with measurement resolution on the…
We used high-speed full-spectrum interrogation of a Fiber Bragg Grating (FBG) sensor to measure dynamic strain in different sensor packages in real-time. In this effort we performed solenoid impact tests on a variety of sensor mounting structures made with FR4, steel, and carbon fiber composite materials. Full spectrum FBG interrogation at 40 kHz repetition rate was the key that allowed us to measure and compare dynamic strain in the structures, with measurement resolution on the sub-millisecond scale.
Other authorsSee publication
Courses
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Advanced Optical Engineering
ECEN 661
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Business Communication
MGMT 2200
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Computational EM
ECEN 563
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Intro to Business
MGMT 1010
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Introduction to Algorithms
ECEN 521
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Math of Signals & Systems
ECEN 671
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Medical Imaging & Image Reconstruction
ECEN 676
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Optical Comm Components
ECEN 562
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Optoelectronic Devices
ECEN 555
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Scanning Electron Microscopy
BIO 580
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Semiconductor Devices Phscs
PHSCS 587
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Seven Habits of Highly Effective People
SLSS 1200
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Stochastic Processes
ECEN 670
Projects
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Increasing dynamic range of a fiber Bragg grating edge-filtering interrogator with a proportional control loop
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Stabilizing edge filtering interrogation method for frequencies up to 1kHz
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Test Scores
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TOEFL - Test of English as a Foreign Language
Score: 109/120
This was a comprehensive test with reading, listening, speaking and writing sections. My score was at 94th percentile out of all the test takers and 91st percentile amongst graduate-level students in the world.
Languages
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English
Native or bilingual proficiency
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Serbian
Native or bilingual proficiency
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German
Elementary proficiency
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Russian
Elementary proficiency
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French
Elementary proficiency
Organizations
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SPIE - Society of Photo-Optical Instrumentation Engineers
Author
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Recommendations received
1 person has recommended Nikola
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We're thrilled to announce our participation in AWE 2024—the world's largest spatial computing event for the global XR community. Visit us at booth…
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Magic Leap Defense & Public Sector participated at the MOVES open house at the Naval PostGraduate School in Monterey, California. The event focused…
Magic Leap Defense & Public Sector participated at the MOVES open house at the Naval PostGraduate School in Monterey, California. The event focused…
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'Magic Leap has given me the opportunity to provide not only strong technical contributions, but the chance to lead engineers and scientists. I enjoy…
'Magic Leap has given me the opportunity to provide not only strong technical contributions, but the chance to lead engineers and scientists. I enjoy…
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Proud to be a part of company with such values! 💜💙💚💛🧡❤️♥️
Proud to be a part of company with such values! 💜💙💚💛🧡❤️♥️
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