Design of the smart optoelectronic NOT gate based on directional couplers

✍ Scribed by Wen-Ching Chang; Yang-Han Lee; Jiang-Duh Fang; Ming-Yung Hsuan; Li-Ying Chang

• Book ID: 101273415
• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 220 KB
• Volume: 24
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(20000220)24:4<271::aid-mop18>3.0.co;2-8

✦ Synopsis

Figure 7 Straight-to-curved transition loss variation as a function of X rZ for sine S-bends for X s 250 m, s 0.4Њ, 0.5Њ, 0.6Њ, s s s B and s 1.55 m

The loss values have been calculated for a number of assorted values of X and Z . As can be seen, these loss values s s are negligibly small. For very low-loss integrated-optic wavew x guides, such as those reported in 14 with propagation loss values of 0.02 dBrcm, such loss improvements can be meaningful.

IV. CONCLUSION

The new slope-matched sinercosine S-bend designs presented here show a performance better than that of the conventional sinercosine S-bends when used for connecting offset straight waveguides inclined with respect to each other; the performance remains better for a wide range of longitudinal and transverse offset parameters. The loss performance of the slope-matched designs can be improved further by incorporating lateral offset between the straight and the curved waveguides.

ACKNOWLEDGMENT

The authors are grateful to Mr. Manu Sharma for some of the calculations, and Mr. Uma