Search

Your search keyword '"Harshil Dave"' showing total 8 results
Start Over Author "Harshil Dave" Journal conference on lasers and electro-optics
8 results on '"Harshil Dave"'

1. Modulation Response of Coupled Microcavity Laser Array Operated Near Modal Exceptional Point

Author

Zihe Gao, Harshil Dave, and Kent D. Choquette

Subjects
Physics, Exceptional point, business.industry, Physics::Optics, 02 engineering and technology, Laser array, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, law.invention, 010309 optics, Optics, Modal, Interference (communication), Laser diode rate equations, Modulation, law, 0103 physical sciences, Physics::Atomic Physics, 0210 nano-technology, business
Abstract

Laser array dynamics of coupled microcavity laser arrays operated near a modal exceptional point is studied using coupled laser rate equations. Tuning the laser array near exceptional point results in rejection of common-mode interference.

Published
2020

2. Non-Hermiticity in Weakly Coupled Semiconductor Laser Arrays

Author

Kent D. Choquette, Zihe Gao, Harshil Dave, Matthew T. Johnson, and Bradley J. Thompson

Subjects
Physics, business.industry, Beam steering, Physics::Optics, Laser array, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Laser, Coupled mode theory, law.invention, Semiconductor laser theory, Condensed Matter::Materials Science, Charge-carrier density, Semiconductor, law, Optoelectronics, Photonics, business
Abstract

Coupled semiconductor laser arrays are naturally non-Hermitian optical systems. We show that in a weakly coupled semiconductor laser array, the control for gain/loss is dominated by the nonlinearities, rather than simply following the pump profile.

Published
2018

3. Control and Simulation of Coherent Array Modes in Vertical Cavity Laser Arrays

Author

Stewart T. M. Fryslie, Kent D. Choquette, Katherine Lakomy, Harshil Dave, Zihe Gao, and Bradley J. Thompson

Subjects
Physics, business.industry, Mode (statistics), 02 engineering and technology, Laser array, Laser, law.invention, 020210 optoelectronics & photonics, Optics, law, 0202 electrical engineering, electronic engineering, information engineering, business, Refractive index, Photonic crystal
Abstract

A 3x1 vertical-cavity surface-emitting laser array is resonantly tuned to multiple coherent modes. Experimental near-field and far-field coherent modes profiles are characterized and simulated. The center element bias demonstrates control of the coherent mode.

Published
2018

4. 36 Gb/s Error Free Modulation of 850nm Monolithic Injection Locked VCSEL Arrays

Author

Stewart T. M. Fryslie, Alan E. Willner, Zihe Gao, Bradley J. Thompson, Peicheng Liao, Harshil Dave, and Kent D. Choquette

Subjects
Materials science, business.industry, Scanning electron microscope, Physics::Optics, 02 engineering and technology, Injection locked, Vertical-cavity surface-emitting laser, Injection locking, 020210 optoelectronics & photonics, Modulation, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Photonics, business, Photonic crystal
Abstract

We report direct modulation of 2x1 proton-implanted index-confined photonic crystal coherently-coupled VCSEL array operating error free at 36 Gb/s. The high-speed modulation is attributed to modulation-bandwidth enhancement.

Published
2018

5. Uniform Operation of Coherent Photonic Crystal VCSEL Arrays

Author

Bradley J. Thompson, Harshil Dave, Kent D. Choquette, Stewart T. M. Fryslie, Katherine Lakomy, and Zihe Gao

Subjects
Current range, Materials science, business.industry, Visibility (geometry), 02 engineering and technology, Injection locked, Vertical-cavity surface-emitting laser, Power (physics), Electrical isolation, 020210 optoelectronics & photonics, Optics, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, business, Photonic crystal
Abstract

Coherent 1×2 VCSEL arrays with improved electrical isolation have enhanced output power, visibility, and uniformity for injection locked operation. The current range for locked operation is as large as 0.5mA, which decreases with increasing bias.

Published
2017

6. Coherent Vertical Cavity Phased Microlaser Arrays

Author

Katherine Lakomy, Zihe Gao, P. Scott Carney, Stewart T. M. Fryslie, Bradley J. Thompson, Harshil Dave, and Kent D. Choquette

Subjects
Physics, Brightness, business.industry, Beam steering, Physics::Optics, Laser, law.invention, Optics, law, Physics::Accelerator Physics, Optoelectronics, business, Photonic crystal, Coherence (physics)
Abstract

The characteristics and performance of implanted photonic crystal coherent vertical cavity laser arrays are reported. We discuss control of the coherence, phase, brightness, and beam steering, as well as achieving record small signal bandwidth for digital modulation.

Published
2017

7. Non-Hermitian Aspects of Coherently Coupled Vertical Cavity Laser Arrays

Author

Bradley J. Thompson, Kent D. Choquette, Katherine Lakomy, Zihe Gao, P. Scott Carney, Stewart T. M. Fryslie, and Harshil Dave

Subjects
Physics, business.industry, media_common.quotation_subject, Physics::Optics, Laser array, Laser, Asymmetry, Hermitian matrix, Vertical-cavity surface-emitting laser, Characterization (materials science), law.invention, Optics, law, Mode switching, Optoelectronics, Symmetry breaking, business, media_common
Abstract

Coherently coupled 1 × 2 VCSEL arrays with intentional built-in asymmetry have been designed and fabricated. Preliminary characterization shows electrically controlled mode switching and indications of parity-time symmetry breaking.

Published
2017

8. Uniform, High Modulation Bandwidth VCSEL Arrays

Author

Stewart T. M. Fryslie, Bradley J. Thompson, Katherine Lakomy, Harshil Dave, Kent D. Choquette, and Zihe Gao

Subjects
Modulation bandwidth, Improved performance, Materials science, business.industry, Single-mode optical fiber, Mode (statistics), Physics::Optics, Optoelectronics, business, Sample (graphics), Photonic crystal, Vertical-cavity surface-emitting laser
Abstract

We show improved performance from high-speed 1×2 phased, photonic crystal VCSEL arrays. A modulation bandwidth of 37 GHz is obtained under highly single mode coherently coupled operation in the in-phase coupled mode. Modulation bandwidth > 30 GHz are found for all photonic crystal designs on the sample.

Published
2017

Catalog

Books, media, physical & digital resources
See catalog results