Femtosecond laser writing of a flat-top interleaver via cascaded Mach-Zehnder interferometers
2012; Optica Publishing Group; Volume: 20; Issue: 16 Linguagem: Inglês
10.1364/oe.20.017894
ISSN1094-4087
AutoresJason C. Ng, Chengbo Li, Peter R. Herman, Li Qian,
Tópico(s)Advanced Fiber Laser Technologies
ResumoA flat-top interleaver consisting of cascaded Mach-Zehnder interferometers (MZIs) was fabricated in bulk glass by femtosecond laser direct writing. Spectral contrast ratios of greater than 15 dB were demonstrated over a 30 nm bandwidth for 3 nm channel spacing. The observed spectral response agreed well with a standard transfer matrix model generated from responses of individual optical components, demonstrating the possibility for multi-component optical design as well as sufficient process accuracy and fabrication consistency for femtosecond laser writing of advanced optical circuits in three dimensions.
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