Stripe-geometry double heterojunction laser device
Patent
·
OSTI ID:5507644
A stripe-shaped excitation region is provided in an active layer of a double heterojunction laser device, the excitation region and the other region of the active layer being endowed with an effective refractive index difference or optical absorption coefficient difference therebetween, and a carrier injection region is provided contiguously to the excitation region, whereby the laser device exhibits a low ohmic resistance, effects a stable lower-order transverse mode oscillation and suppresses relaxation oscillations. By preventing the stripe-shaped excitation region and the carrier injection region from being exposed to reflective surfaces, the aforecited beneficial results can be realized over a wide range of operating currents, and a laser device of extremely high power density emission is achieved due to the increase of the threshold of the catastrophic optical damage on mirrors.
- Assignee:
- Nippon Electric Co Ltd (Japan)
- Patent Number(s):
- US 4309668
- OSTI ID:
- 5507644
- Country of Publication:
- United States
- Language:
- English
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