We have investigated the lateral waveguiding properties of a VCSEL for lateral detection application to integrated power monitoring. Spontaneous and Amplified Spontaneous emissions guiding in the plane of the cavity has been modelled and demonstrated experimentally in collaboration with Yann Boucher (ENIB-RESO-Brest). Thanks to the use of a Schottky contact, the threshold and the thermal extinction of the lasing emission can be clearly identified on the lateral signal. The monotonous increase of the photocurrent between threshold and extinction makes this lateral detection suitable for integrated VCSEL power monitoring with a higher level for the photodetected light.
[Electron. Lett. Vol 41, 3,2005] [ Optical and Quantum Electronics, Vol 38, n°4-6,2006] .