We review our recent progress in novel planar blue-violet laser diodes (BV-LDs). The planar BV-LDs are characterized
by an inner-stripe waveguide formed with a buried AlN current-blocking layer and a wide regrown cladding layer that
also acts as a current and heat spreader. These features enable high-power operation for BV-LDs thanks to their low
electrical and low thermal resistance even with a narrow-stripe waveguide. In this paper, we report successful
demonstration of the planar inner-stripe BV-LDs by utilizing low-temperature-grown AlN and the regrown cladding
layer. Low electrical resistance of the regrown cladding layer was confirmed by scanning spread resistance microscopy.
Heat spreading characteristics were also investigated by 2-dimensional thermal simulation. The fabricated BV-LDs with
a 1.4-&mgr;m-wide stripe achieved a low threshold current of 32 mA, a low threshold voltage of 4.1 V and greater than 200-
mW kink-free output power under CW operation. Moreover, the kink-free output level surpassed 1,000 mW for the 1.0-
&mgr;m stripe BV-LDs under 0.03%-duty-pulsed operation. The BV-LDs operated stably for more than 1,000 hours at a high
output power of 200 mW at 80oC under a 50%-duty-pulsed condition. After the reliability test, transmission electron
microscopy revealed no defect near the regrown interface of the tested LDs.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.