Vertical-cavity surface-emitting laser diode and optical transmission apparatus

An optical transmission apparatus comprising:

• an electronic component including a vertical-cavity surface-emitting laser diode;
• and
• a housing that covers the electronic component and to which an optical fiber is fixed,
• wherein the vertical-cavity surface-emitting laser diode includes:
• a first resonator that includes a first current narrowing structure having a first conductive region,
• a second resonator that includes a second current narrowing structure having a second conductive region,
• a coupling portion that couples the first resonator with the second resonator, the coupling portion having a third conductive region, the third conductive region connecting the first conductive region and the second conductive region;
• and
• a non-conductive region continuously surrounding the first conductive region, the second conductive region and the third conductive region, wherein:
• the first, second, and third conductive regions are formed in a common current narrowing layer,
• a width of the third conductive region is narrower than each of widths of the first and second conductive region, and
• an equivalent refractive index of the coupling portion is smaller than an equivalent refractive index of each of the first resonator and the second resonator.