Tài liệu Laser điốt được phân phối thông tin phản hồi và các bộ lọc du dương quang P4 ppt

... the –continuous change in laser cavity corrugation period Tapered corrugation large number –  varies along the –continuous change in laser cavity corrugation depth g N-layer surface emitting N –– laser 112 TRANSFER ... showing a 1PS DFB laser diode section. 106 TRANSFER MATRIX MODELLING IN DFB SEMICONDUCTOR LASERS 16. Agrawal, G. P. and Bobeck, A. H., Modelling of distributed feedbac...

Ngày tải lên: 15/12/2013, 04:15

... [15,16]. Alternatively, semiconductor lasers oscillating in single longitudinal modes were developed [17,18]. By limiting the spread of the laser spectrum, this type of laser is widely used in upgrading ... communications was hindered due to poor spectral purity and frequency instability in semiconductor lasers. Due to advances in fabrication techniques, semiconductor lasers nowadays show...

Ngày tải lên: 15/12/2013, 04:15

... Imai, H., Linewidth reduction in a DFB laser by detuning effect, Electron. Lett., 23, 393–394, 1987. 10. Kru ¨ ger, U. and Petermann, K., The semiconductor laser linewidth due to the presence of ... semiconductor lasers, IEEE J. Quantum Electron., QE-26(1), 32–44, 1990. 23. Duan, G. H., Gallion, P. and Debarge, G., Analysis of spontaneous emission rate of distributed feedback semiconducto...

Ngày tải lên: 15/12/2013, 04:15

... LDS Distributed Bragg reflector laser diodes can be formed by replacing one or both of the discrete laser mirrors with a passive grating reflector as shown in Fig. 10.21. By definition, the grating reflectors are ... such as laser diodes, optical switches and photo- detectors [4]. As a result, =4-shifted DFB LDs can be used as semiconductor optical filters when biased below threshold [5–6]....

Ngày tải lên: 15/12/2013, 04:15

... respectively, b o ¼ p=L is the Bragg frequency of the grating and L is the grating period. Substituting eqn (11.1) into Maxwell’s equations and neglecting the second derivatives of both RðzÞ and SðzÞ ... Multisection DFB Semiconductor Lasers. IEEE J. Quantum Electron., 27(11), 2404–2414, 1991. 14. Kogelnik, H. and Shank, C. V., Coupled-Wave Theory of Distributed Feedback Lasers. J. Appl. Phys...

Ngày tải lên: 24/12/2013, 12:17

... DFB semiconductor lasers are classified into three different groups: purely index-coupled DFB semiconductor lasers; mixed-coupled DFB semiconductor lasers and purely gain- or loss- coupled DFB semiconductor ... become common in FP semiconductor lasers. The lasing spectrum and the spectral properties of the FP laser cavity are important in the field of semiconductor lasers, since other semicon...

Ngày tải lên: 15/12/2013, 04:15

... and Dutta, N. K., Long-Wavelength Semiconductor Lasers. Princeton, NJ: Van Nostrand, 1986. 8. Kinoshita, J., Validity of L evaluation by stopband method for =4 DFB lasers with low reflecting facets, ... discontinuity is introduced during fabrication in which the slip is written directly along the corrugation. In the analysis, we adopted the latter method in preparing phase shifts in a DFB l...

Ngày tải lên: 15/12/2013, 04:15

...  B is assumed. The DCC laser structure used is different from the continuous- pitch-modulated (CPM) DFB laser [10] in which  is varying along the laser cavity. In a DCC DFB laser, it is important ... (a) a conventional DFB laser diode; (b) a single QWS DFB laser diode; (c) a three /2-phase-shifted DFB laser diode. THRESHOLD ANALYSIS OF THE THREE-PHASE-SHIFT (3PS) DFB LASER 1...

Ngày tải lên: 15/12/2013, 04:15

... and Dutta, N. K., Long-Wavelength Semiconductor Lasers. Princeton, NJ: Van Nostrand, 1986. 8. Henry, C. H., Theory of spontaneous emission noise in open resonators and its application to lasers and ... laser structures. The TMM-based above-threshold laser model was applied to several DFB laser structures including QWS, 3PS and DCC DFB LDs. The QWS DFB laser structure, which is charact...

Ngày tải lên: 15/12/2013, 04:15

... gain-coupled) and DBR lasers [21–23], quantum well (QW) lasers [24], cleaved- coupled-cavity (CCC) lasers [25] external cavity (EC) mode-locked lasers [26], fibre grating lasers [27] and laser amplifiers ... dependence of semiconductor laser gain in the transmission-line laser model. 8.4 TRANSMISSION-LINE LASER MODELLING (TLLM) The transmission-line laser model is a wide-bandwidth dyn...

Ngày tải lên: 15/12/2013, 04:15