A monolithic microchannel-cooled laser diode array is demonstrated that allows multiple diode-bar mounting with negligible thermal cross talk. The heat sink comprises two main components: a wet-etched Si layer that is anodically bonded to a machined glass block. The continuous wave (cw) thermal resistance of the 10 bar diode array is 0.032 °C/W, which matches the performance of discrete microchannel-cooled arrays. Up to 1.5 kW/cm2 is achieved cw at an emission wavelength of ∼808 nm. Collimation of a diode array using a monolithic lens frame produced a 7.5 mrad divergence angle by a single active alignment. This diode array offers high average power/brightness in a simple, rugged, scalable architecture that is suitable for large two-dimensional areas.

1.
R. J.
Beach
,
W. J.
Benett
,
B. L.
Freitas
,
D.
Mundinger
,
B. J.
Comaskey
,
R. W.
Solarz
, and
M. A.
Emanuel
,
IEEE J. Quantum Electron.
28
,
966
(
1992
).
2.
V.
Krause
,
H.-G.
Treusch
,
P.
Loosen
,
T.
Kimpel
,
J.
Biesenbach
,
A.
Kosters
,
F.
Robert
,
H.
Oestriecher
,
M.
Marchiano
, and
B.
Deordorico
,
Proceedings of the International Society for Optical Engineering
,
Munich FRG
[
Proc. SPIE
2148
,
351
(
1994)
].
3.
J. G.
Endriz
,
M.
Vakili
,
G. S.
Browder
,
M.
Devito
,
J. M.
Haden
,
G. L.
Harnagel
,
W. E.
Plano
,
M.
Sakamoto
,
D. F.
Welch
,
S.
Willing
,
D. P.
Worland
, and
H. C.
Yao
,
IEEE J. Quantum Electron.
28
,
952
(
1992
).
4.
K. Linden, final report, Contract No. DAAB07-87-C-F087, Feb. 1988.
5.
M.
Jansen
,
P.
Corvini
,
F.
Fang
,
M.
Finander
,
M.
Hmelar
,
T.
Johnston
,
C.
Jordan
,
R.
Nabiev
,
J.
Nightingale
,
M.
Widman
,
H.
Asonen
,
J.
Aarik
,
A.
Salokatve
,
J.
Nappi
, and
K.
Rakennus
,
Opt. Express
4
,
3
(
1999
).
6.
H. Asonen (private communication).
7.
Note that Rth (calc) corresponds to the mean temperature across the 1-mm-cavity-length diode, whereas Rth (meas) corresponds to the lasing-wavelength temperature. Higher modal gain at lower temperature should favor lasing at shorter wavelength than is associated with the mean junction temperature of the diode.
This content is only available via PDF.
You do not currently have access to this content.