质子注入VCSELs的协同锁频多模操作

1998 Conference on Optoelectronic and Microelectronic Materials and Devices. Proceedings (Cat. No.98EX140) Pub Date : 1998-12-14 DOI:10.1109/COMMAD.1998.791597

A. Rakić, V. Boros, M. Majewski, M.I. Cohen

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引用次数: 3

摘要

在垂直腔面发射激光器(VCSELs)中，双折射和像散是提高横向模频率和偏振简并度的主要原因。本文报道了VCSEL近简并TEM/sub 01/和TEM/sub 10/模式的“协同频率锁定”现象。在一定注入电流范围内，两种模式协同锁频，形成稳态TEM*/sub - 01/混合模式(甜甜圈)。这种模式呈现出螺旋波前结构，在轴上存在相位奇点，从而降低了光束质量。

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Cooperatively frequency-locked multimode operation in proton implanted VCSELs

It is known that birefringence and astigmatism are responsible for lifting the frequency and polarization degeneracy of transverse modes in Vertical-Cavity Surface-Emitting Lasers (VCSELs). We report on observation of "cooperative frequency locking" of nearly degenerate TEM/sub 01/ and TEM/sub 10/ modes of a VCSEL. For a certain range of injection currents two modes become cooperatively frequency locked in phase quadrature to form a steady-state TEM*/sub 01/ hybrid mode (doughnut). This mode exhibits a helical wavefront structure with the phase singularity on the axis, thus degrading the beam quality.

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1998 Conference on Optoelectronic and Microelectronic Materials and Devices. Proceedings (Cat. No.98EX140)

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