Characterization of semiconductor laser gain media by the segmented contact method
Characterization of semiconductor laser gain media by the segmented contact method
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DOI：
10.1109/jstqe.2003.819472
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发表时间：
2003-09-01
影响因子：
4.9
通讯作者：
Lutti, J
中科院分区：
文献类型：
--
作者：
Blood, P;Lewis, GM;Lutti, J
在本文中，我们描述了作为泵浦条带长度的函数测量的边缘发射放大自发发射光谱的分析方法。我们表明，模态增益和未放大的自发发射光谱都可以从数据中提取，并且我们描述了一种以实际单位校准自发发射的方法，而不需要用费米函数来描述载流子布居。可以确定横向电极化和横向磁极化的增益和发射光谱，并且通过将每个极化的复合电流相加，可以测量总辐射电流。这使得能够计算总体内部辐射量子效率。一旦校准因子已知，也可以估计面处的内部受激复合率。该实验可以配置为测量增益介质的无源模态吸收。内部光学模式损耗可以根据增益谱或模式吸收谱的长波长区域来确定。总之，我们表明放大自发发射光谱的测量提供了增益介质的完整表征。
In this paper, we describe methods for analysis of edge-emitted amplified spontaneous emission spectra measured as a function of the pumped stripe length. We show that both the modal gain and the unamplified spontaneous emission spectra can be extracted from the data, and we describe a means of calibrating the spontaneous emission in real units, without requiring the carrier populations to be described by Fermi functions. The gain and emission spectra can be determined for transverse electric and transverse magnetic polarizations and by summing, the recombination currents for each polarization the total radiative current can be measured. This enables the overall internal radiative quantum efficiency to be calculated. Once the calibration factor is known the internal stimulated recombination rate at the facet can also be estimated. The experiment can be configured to give a measurement of the passive modal absorption of the gain medium. The internal optical mode loss can be determined from the long-wavelength region of the gain spectrum or the modal absorption spectrum. In summary, we show that measurements of amplified spontaneous emission spectra provide a full characterization of the gain medium.