High speed, high power one-dimensional beam steering from a 6-element optical phased array

被引：46

作者：

Huang, W. Ronny ^{[1
]}

Montoya, Juan ^{[1
]}

Kansky, Jan E. ^{[1
]}

Redmond, Shawn M. ^{[1
]}

Turner, George W. ^{[1
]}

Sanchez-Rubio, Antonio ^{[1
]}

机构：

[1] MIT, Lincoln Lab, Lexington, MA 02420 USA

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 16期

关键词：

INSULATOR;

D O I：

10.1364/OE.20.017311

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Beam steering at high speed and high power is demonstrated from a 6-element optical phased array using coherent beam combining (CBC) techniques. The steering speed, defined as the inverse of the time to required to sweep the beam across the steering range, is 40 MHz and the total power is 396 mW. The measured central lobe FWHM width is 565 mu rad. High on-axis intensity is maintained periodically by phase-locking the array via a stochastic-parallel-gradient-descent (SPGD) algorithm. A master-oscillator-power-amplifier (MOPA) configuration is used where the amplifier array elements are semiconductor slab-coupled-optical-waveguide-amplifiers (SCOWAs). The beam steering is achieved by LiNbO3 phase modulators; the phase-locking occurs by current adjustment of the SCOWAs. The system can be readily scaled to GHz steering speed and multiwatt-class output. (C) 2012 Optical Society of America

引用

页码：17311 / 17318

页数：8

共 11 条

[1] AlGaAs-InGaAs slab-coupled optical waveguide lasers [J].