Linewidth optimization in fiber grating Fabry–Perot laser
Linewidth optimization in fiber grating Fabry–Perot laser
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DOI：
10.1117/1.oe.53.2.026107
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发表时间：
2014-02
影响因子：
1.3
通讯作者：
H. Hisham;G. A. Mahdiraji;A. Abas;M. Mahdi;F. R. Mahamd Adikan
中科院分区：
文献类型：
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作者：
H. Hisham;G. A. Mahdiraji;A. Abas;M. Mahdi;F. R. Mahamd Adikan
抽象的。对光纤光栅法布里-珀罗（FGFP）激光器的线宽进行了数值优化。除了外部光反馈（OFB）之外，温度、注入电流、腔体积、增益压缩因子和外部腔参数[即，耦合系数（Co）和外腔长度（Lext）]对线宽特性的影响。根据外光场和温度对阈值载流子密度的影响，计算了它们对线宽特性的影响。根据激光器参数的温度依赖关系计算了线宽特性的温度依赖关系，而不是众所周知的Pankove关系。结果表明，最佳外腔长度（Lext）为3.1cm，最佳工作温度范围为光纤布拉格光栅（FBG）参考温度（To）±2°C。此外，1×10−2的AR涂层反射率值足以使激光器在窄线宽和低制造复杂度下工作。线宽可以通过增加激光注入电流或外OFB能级的强度来减小。
Abstract. Linewidth optimization of a fiber grating Fabry–Perot (FGFP) laser is performed numerically. In addition to the external optical feedback (OFB), the effect of temperature, injection current, cavity volume, gain compression factor, and external cavity parameters [i.e., coupling coefficient (Co) and external cavity length (Lext)] on linewidth characteristics are investigated. The effects of external OFB and temperature on linewidth characteristics are calculated according to their effect on threshold carrier density (Nth). The temperature dependence (TD) of linewidth characteristics is calculated according to the TD of laser parameters instead of the well-known Pankove relationship. Results show that the optimum external cavity length (Lext) is 3.1 cm and the optimum range of operating temperature is within ±2°C from the fiber Bragg grating (FBG) reference temperature (To). In addition, the antireflection (AR) coating reflectivity value of 1×10−2 is sufficient for the laser to operate at narrow linewidth and low fabrication complexity. The linewidth can be reduced either by increasing the laser injection current or the strength of external OFB level.