基于腔内向列型液晶的电调谐垂直腔面发射激光器的优化

Optimization of electrically tunable VCSEL with intracavity nematic liquid crystal.

作者信息

Belmonte Carlos, Frasunkiewicz Leszek, Czyszanowski Tomasz, Thienpont Hugo, Beeckman Jeroen, Neyts Kristiaan, Panajotov Krassimir

出版信息

Opt Express. 2015 Jun 15;23(12):15706-15. doi: 10.1364/OE.23.015706.

DOI:10.1364/OE.23.015706

PMID:26193549

Abstract

We optimize the wavelength tuning range of a Vertical-Cavity Surface-Emitting Laser with an intracavity layer of nematic Liquid Crystal (LC-VCSEL) lasing around 1.3 μm. The tunability is obtained by applying voltage to the liquid crystal layer, which esentially is to vary the refractive index from the extraordinary to the ordinary. We achieve 71.6 nm continuous tuning (without mode hopping) with liquid crystal thickness of about 3.2 μm. We investigate the impact of ambient temperature on the LC-VCSEL tuning range and show that mode-hop tuning can be achieved in the temperature range from -10°C to 50°C where the LC is in nematic phase.

摘要

我们优化了一种垂直腔面发射激光器（VCSEL）的波长调谐范围，该激光器带有一层向列型液晶的腔内层（LC-VCSEL），其激光波长约为1.3μm。通过向液晶层施加电压来实现可调谐性，这本质上是将折射率从非常光折射率改变为寻常光折射率。我们在液晶厚度约为3.2μm时实现了71.6nm的连续调谐（无模式跳变）。我们研究了环境温度对LC-VCSEL调谐范围的影响，并表明在-10°C至50°C的温度范围内，当液晶处于向列相时，可以实现模式跳变调谐。