Simulations of statistical parameter distributions in distributed-feedback lasers using a transmission-line laser model

被引:0
作者
Reid, B [1 ]
Woods, I [1 ]
White, JK [1 ]
Hinzer, K [1 ]
Vitic, M [1 ]
Robinson, D [1 ]
Grabham, A [1 ]
机构
[1] Bookham Technol Inc, Ottawa, ON K2K 2B5, Canada
来源
PHOTONICS NORTH: APPLICATIONS OF PHOTONIC TECHNOLOGY, PTS 1 AND 2: CLOSING THE GAP BETWEEN THEORY, DEVELOPMENT, AND APPLICATION | 2004年 / 5579卷
关键词
TLLM; DFB lasers; SMSR; small-signal; gain-coupled; directly-modulated; distributions; facet phases; dispersion penalty;
D O I
10.1117/12.567375
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
A transmission-line laser model has been used for simulating distributed-feedback (DFB) lasers. Statistical distributions of laser parameters like threshold current, slope efficiency, front-to-back power ratio, or side-mode-suppression ratio (SMSR) are generated by randomly varying the lasers' facet phases. Model parameters were adjusted by comparing simulated and experimental distributions for a continuous wave (CW) index-coupled laser and a 2.5Gb/s gain-coupled directly-modulated (DM) DFB laser. For the index-coupled DFB laser, agreement with experimental data is excellent but the front-to-back power ratio, which has a larger spread than measured experimentally. For the gain-coupled DFB laser, distributions are in excellent agreement with experimental data, but the SMSR is calculated to have a median about 5dB larger than measurement. Distributions of dispersion penalties after propagation in an optical fiber are also generated for various drive conditions and design parameters. It is shown that a grating with an index coupling larger than 4.0 and a gain coupling of around 0.05 gives the highest 2dB dispersion penalty yields for a reach of 450km. There is nevertheless a compromise between high dispersion penalty yields and CW single-mode yields when using large index coupling coefficients with only a small amount of gain coupling.
引用
收藏
页码:295 / 305
页数:11
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