Solid State wavemeter with InGaAsP/InGaAs two-diode heterostructure

L. Colace, G. Masini, and G. Assanto

Electron. Lett. 38, 735-737 (2002)


A novel photodetector with wavemeter capability in the near infrared is demonstrated. The device is an InGaAsP/InGaAs double heterostructure operating as two back-to-back photodiodes with different spectral responses. This prototype is able to determine monochromatic-light wavelengths with an accuracy of 40 pm around 1.55 m and a sensitivity of about 0.14 A/nm.