Abstract
The effect of the radiation coherence length on the lasing channels lateral dimensions in a planar laser diode with a wide contact is considered. The relationship between the coherence of high-power laser diode radiation, its spectrum and the nonlinear optical properties of the laser resonator active medium is discussed.
Highlights
Laser diodes (LD) with a wide contact have a characteristic peculiarity: in their lateral mode spectrum, as a rule, there are non-phase-locked spatial channels of generation [1, 2]
Modern LD with a wide contact and quantum wells (QW) show the similar modes of generation, but it occurs at high power levels (0.5 W and more) [3]
LD with QW has a radiation spectrum of 2-3 orders narrower, and the gain much higher at the same pump. This circumstance leads to the necessity to take into account the influence of nonlinear refraction and light spatial coherence on the spectral-spatial characteristics of LD radiation [4, 5]
Summary
Laser diodes (LD) with a wide contact (more than 50 microns) have a characteristic peculiarity: in their lateral mode spectrum, as a rule, there are non-phase-locked spatial channels of generation [1, 2]. Modern LD with a wide contact and quantum wells (QW) show the similar modes of generation, but it occurs at high power levels (0.5 W and more) [3]. This circumstance leads to the necessity to take into account the influence of nonlinear refraction and light spatial coherence on the spectral-spatial characteristics of LD radiation [4, 5].
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