Longitudinal spatial hole burning, its impact on laser operation,and suppression

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2015,（11）
• 页码范围: 1045-1046
• 页数: 2页
• 语种: 中文
• DOI: 10.1007/s11434-015-0812-1

摘要

Longitudinal spatial hole burning (LSHB) is a common effect that appears in lasers with standing-wave cavities,especially in edge-emitting semiconductor laser diodes.The standing-wave pattern introduces a non-uniform distribution of the photon density along the laser cavity.Due to the anti-correlationship between the carrier and photon densities (as the stimulated emission depletes carriers where photons exist),the carrier density distribution becomes non-uniform as well,which further causes the nonuniformity of the optical gain of the active region and the refractive index of the waveguide along the cavity.As such,the lasing condition,determined by the gain and refractive index (through the amplitude and phase condition,respectively),is jeopardized.