Two-dimensional pseudo-random optical phased array based on tandem optical injection locking of vertical cavity surface emitting lasers

Sayyah, Keyvan; Efimov, Oleg M.; Patterson, P.R.; Schaffner, James H.; White, Carson R.; Seurin, Jean-Francois; Xu, Guoyang; Miglo, Alexander

doi:10.1364/oe.23.019405

Cited by 43 publications

(30 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The rapid maturity and growth of development in the photonic integrated circuits market allow unusual molding of them in numerous geometric configuration and materials technologies, combining both active and passive components (non-Hermitian engineering) [32]. In addition, the introduction of defects [33] or injection of strong optical signals [34] in a localized region within the array may provide another path for improved performance and radical functionality. Therefore, such reconfigurable phased-array designs may enable revolutionary devices for beam steering in wireless optical links.…”

Section: Discussionmentioning

confidence: 99%

Engineering the emission of laser arrays to nullify the jamming from passive obstacles

Valagiannopoulos

Kovanis

2018

Photon. Res.

View full text Add to dashboard Cite

Non-Hermitian characteristics accompany any photonic device incorporating spatial domains of gain and loss. In this work, a one-dimensional beam-forming array playing the role of the active part is disturbed from the scattering losses produced by an obstacle in its vicinity. It is found that the placement of the radiating elements leading to perfect beam shaping is practically not affected by the presence of that jammer. A trial-and-error inverse technique of identifying the features of the obstacle is presented based on the difference between the beam target pattern and the actual one. Such a difference is an analytic function of the position, size, and texture of the object, empowering the designer to find the feeding fields for the lasers giving a perfect beam forming. In this way, an optimal beam-shaping equilibrium is re-established by effectively cloaking the object and nullifying its jamming effect.

show abstract

Section: Discussionmentioning

confidence: 99%

Engineering the emission of laser arrays to nullify the jamming from passive obstacles

Valagiannopoulos

Kovanis

2018

Photon. Res.

View full text Add to dashboard Cite

show abstract

“…In Ref. [61], an approach was outlined how such VCSEL arrays can be made coherent by injection locking them with a single master laser. Only 1 μW per VCSEL was required to achieve locking.…”

Section: Technology Outlook and Opportunities For Future Developmentsmentioning

confidence: 99%

Highly integrated optical phased arrays: photonic integrated circuits for optical beam shaping and beam steering

2016

View full text Add to dashboard Cite

Abstract:Technologies for efficient generation and fast scanning of narrow free-space laser beams find major applications in three-dimensional (3D) imaging and mapping, like Lidar for remote sensing and navigation, and secure free-space optical communications. The ultimate goal for such a system is to reduce its size, weight, and power consumption, so that it can be mounted on, e.g. drones and autonomous cars. Moreover, beam scanning should ideally be done at video frame rates, something that is beyond the capabilities of current opto-mechanical systems. Photonic integrated circuit (PIC) technology holds the promise of achieving low-cost, compact, robust and energy-efficient complex optical systems. PICs integrate, for example, lasers, modulators, detectors, and filters on a single piece of semiconductor, typically silicon or indium phosphide, much like electronic integrated circuits. This technology is maturing fast, driven by highbandwidth communications applications, and mature fabrication facilities. State-of-the-art commercial PICs integrate hundreds of elements, and the integration of thousands of elements has been shown in the laboratory. Over the last few years, there has been a considerable research effort to integrate beam steering systems on a PIC, and various beam steering demonstrators based on optical phased arrays have been realized. Arrays of up to thousands of coherent emitters, including their phase and amplitude control, have been integrated, and various applications have been explored. In this review paper, I will present an overview of the state of the art of this technology and its opportunities, illustrated by recent breakthroughs.

show abstract

“…The optical sources are modulated by external optical components, such as amplitude/phase modulators [3,10,11]. In other OPA configurations, the laser arrays are frequency-locked to coherent optical signals by using either electro-optical phase locked loops or an optical injection-locking technique, whereby the optical signals are directly modulated to achieve phased-array optical signals without the use of an external modulator [3,12,13]. The latter OPA configurations have various advantages when compared with the former OPA configurations, including compactness, low loss, and low power consumption [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Among the performance indicators, the side-lobe level (SLL)-defined as the ratio of the side lobe power to the main lobe power of a far-field radiation pattern-is one of the important performance indicators for the OPA used in real-field applications. The SLLs are reported to be relatively high, approximately equal to −12 dB [10][11][12][13]. The required SLL for practical applications is expected to be 30 dB to prevent unwanted effects, such as false target indications and interference signals [1,3].…”

Section: Introductionmentioning

confidence: 99%

Side-lobe Level Reduction of an Optical Phased Array Using Amplitude and Phase Modulation of Array Elements Based on Optically Injection-Locked Semiconductor Lasers

et al. 2020

View full text Add to dashboard Cite

The side-lobe level (SLL) in optical phased array (OPA) systems should be reduced to ensure their high performance. We investigate theoretically the performance of an OPA based on optically injection-locked (OIL) semiconductor lasers. The phase and amplitude of the OIL laser are modulated by controlling the injection-locking parameters to reduce the SLL as well as to achieve beam steering. We successfully achieved an SLL reduction of >16 dB when compared with the uniform amplitude profile based on the application of the Taylor window function profile to the injection-locked OPA elements. The reduced SLL and high power efficiency achieved in this study can expedite the use of OPA in real field applications, such as free-space communication, imaging, and light detection and ranging (LIDAR).

show abstract

Two-dimensional pseudo-random optical phased array based on tandem optical injection locking of vertical cavity surface emitting lasers

Cited by 43 publications

References 10 publications

Engineering the emission of laser arrays to nullify the jamming from passive obstacles

Engineering the emission of laser arrays to nullify the jamming from passive obstacles

Highly integrated optical phased arrays: photonic integrated circuits for optical beam shaping and beam steering

Side-lobe Level Reduction of an Optical Phased Array Using Amplitude and Phase Modulation of Array Elements Based on Optically Injection-Locked Semiconductor Lasers

Contact Info

Product

Resources

About