An adjustable array device, including: a plurality of tunable lasers (1000a-d) each having an optical light output therefrom and configured whereby the corresponding optical light outputs of the plurality of tunable lasers (1000a-d) have a predefined relationship relative to one another with respect to frequency and each has a different frequency, wherein, in response to a drive signal, the plurality of tunable laser devices (1000a-d) are further configured to adjust the corresponding optical light outputs with respect to frequency while substantially maintaining the predefined relationship, wherein each of the plurality of tunable lasers (1000a-d) includes: a corresponding front grating tuning section (1002a-d) that, in response to the drive signal, adjusts the optical light output while substantially maintaining the predefined relationship, and at least one corresponding rear grating tuning section that is configured to independently adjust the corresponding optical light outputs with respect to frequency while adjusting the predefined relationship, wherein each corresponding front grating tuning section (1002a-d) is electrically coupled to a common drive signal, the corresponding front grating tuning sections (1002a-d) are physically coupled to one another via common metallization during a fabrication process of the adjustable array device, and the corresponding front grating tuning sections (1002a-d) share the common drive signal, the adjustable array device further comprising a controller that is coupled to and configured to output the drive signal to the corresponding front grating tuning sections (1002a-d) of the plurality of tunable lasers (1000a-d). a plurality of tunable lasers (1000a-d) each having an optical light output therefrom and configured whereby the corresponding optical light outputs of the plurality of tunable lasers (1000a-d) have a predefined relationship relative to one another with respect to frequency and each has a different frequency, wherein, in response to a drive signal, the plurality of tunable laser devices (1000a-d) are further configured to adjust the corresponding optical light outputs with respect to frequency while substantially maintaining the predefined relationship, wherein each of the plurality of tunable lasers (1000a-d) includes: a corresponding front grating tuning section (1002a-d) that, in response to the drive signal, adjusts the optical light output while substantially maintaining the predefined relationship, and at least one corresponding rear grating tuning section that is configured to independently adjust the corresponding optical light outputs with respect to frequency while adjusting the predefined relationship, a corresponding front grating tuning section (1002a-d) that, in response to the drive signal, adjusts the optical light output while substantially maintaining the predefined relationship, and at least one corresponding rear grating tuning section that is configured to independently adjust the corresponding optical light outputs with respect to frequency while adjusting the predefined relationship, wherein each corresponding front grating tuning section (1002a-d) is electrically coupled to a common drive signal, the corresponding front grating tuning sections (1002a-d) are physically coupled to one another via common metallization during a fabrication process of the adjustable array device, and the corresponding front grating tuning sections (1002a-d) share the common drive signal, the adjustable array device further comprising a controller that is coupled to and configured to output the drive signal to the corresponding front grating tuning sections (1002a-d) of the plurality of tunable lasers (1000a-d).