We show a fully integrated, coherently combined laser system in the InP-Si3N4 hybrid platform. Coherent combining of two InP-based gain chips is obtained with a combining efficiency of ~92%. Besides, we demonstrate narrow-linewidth, tunable diode lasers in InP/GaAs-Si3N4 platform. The Si3N4 photonic integrated circuit performs as a tunable external cavity for both InP and GaAs gain chips simultaneously. Single frequency lasing at 1.55 and 1 um is simultaneously obtained on a single chip with the spectral linewidths of 18-kHz and 70-kHz respectively. We also obtain wide-angle beam steering by using the wide wavelength tuning range provided by dual-band diode lasers.
KEYWORDS: Semiconductor lasers, Near field optics, Diffraction, Laser optics, High power lasers, Laser development, Near field, Thermal effects, Laser resonators, Metals
We propose and demonstrate a coherently combined mini laser bar of six angled-grating broad-area lasers with near diffraction-limited beam quality. The combined laser system is fully integrated without any external components or feedback control. In our design, adjacent angled-grating broad-area lasers have opposite tilting angles and overlap around the facet. The coherent beam combining is obtained through the Bragg diffraction in the overlapped areas. The near diffractionlimited interference pattern in the far field shows that good spatial coherence is obtained among all six individual lasers. The optical spectra of each output aperture are measured and exhibit the same lasing wavelengths.
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.