Wavelength-selectable microarray light sources of multiple ranges simultaneously fabricated on single wafer

The fabrication of 10-channel DFB laser array by SAG technology

“…The different lasing wavelengths are obtained either by varying the pitch of the built-in grating or by changing the waveguide′s effective refractive index from element to element. Several techniques, such as electron beam lithography [5], ridge width variation [6,7], ridge tilt [8], multiple holographic exposures [9], and sampled gratings [10], have been proposed for the fabrication of DFB laser arrays. Selective area growth (SAG) of multi-quantum wells (MQWs) by metal organic vapor phase epitaxy (MOVPE) has also been used for the fabrication of DFB laser arrays and is an attractive technology [11][12][13].…”

10 Gbit s−1electroabsorption modulator integrated with a DBR laser using the selective area growth technique

“…A dense wavelength division multiplexing (DWDM) system operating at a high bit rate requires stable low chirp transmitters with multiple channel wavelengths. Integration of a WDM transmitter into a single chip or a single package has been studied for the application to metropolitan area networks and access networks because it can allow us to construct low-cost optics modules [1]. There are several reports on integrated transmitters in which distributed feedback (DFB) lasers have been used dominantly [2,3].…”

Fabrication of a four-channel monolithic integrated laser array with asymmetric sampled grating lasers

“…Recent progress in the wavelength division multiplexing (WDM) technologies for broadband fibre optic communication systems has called for a multiple wavelength light source. Integration of lasers into a multi-wavelength laser array (MLA) has been presented as a promising approach to reduce the cost per wavelength so that the cost of packaging and of the required pigtail optics can be shared by a large number of wavelengths [1][2][3][4][5][6][7].…”

“…Conventional approaches to fabricate an MLA require a way to vary the Bragg wavelengths of constituent distributed feedback (DFB) lasers [2] across the array. It can be realized by several techniques, such as multiple holographic exposure, e-beam writing [5] and selective area growth [6]. However, most of the existing approaches are not suitable for mass production because of complex fabrication procedures and difficulties in accurate control of the wavelength spacing.…”