High power 980nm pump lasers are the key components in optical fiber amplifier. Wavelength stability for 980nm Miniuncooled
pump laser is required to maintain the amplifier's efficiency throughout its lifetime. In this paper, a new type of
wavelength stabilizer for uncooled pump laser which utilizes two fiber Bragg gratings (FBGs) matched in wavelength,
bandwidth, and reflectivity is presented. The characteristics of transmissivity and reflectivity for the dual FBGs
stabilized 980nm pump laser are theoretically modeled and experimentally studied. The results show that the output
spectral characteristics of the uncooled pump laser with the dual FBGs have been greatly improved. The laser module
can work steadily over a wide temperature range from 0°C to 70°C, with 0.2nm wavelength shift, along with more than
45dB side mode suppression ratio, and less than 1.57nm spectral bandwidth.
Vanadium dioxide as an optoelectronic material exhibits a phase transition between semiconductor and metallic phases
at a temperature around 68°C, which has attracted the attention of researchers for many decades. A proper theoretical
model was actually presented to analyze the infrared optical properties of vanadium dioxide film by using the theory of
multilayer matrix calculation and a mended Sellmeier dispersion model. According to the theoretical model, the
transmittances of the vanadium dioxide films were calculated at the temperature from 20°C to 100°C and the wavelength
ranged from 400nm to 2500nm. The vanadium dioxide films with different thickness were prepared by magnetron
sputtering on glass substrate, and the optical property measurement was carried out in the experiment. The simulated
calculation of the theoretical model and experimental curves fitted very well. Study on the vanadium dioxide thin film
thickness dependence of the optical properties, the transmittance of vanadium dioxide film reduced with the increasing in
the thickness of film, and thermal hysteresis loop became wide and the phase transition temperature rose with the
increasing in the thickness of the film. The thickness of the VO2 film had significant effect on its optical properties.
High-power single-mode 980nm pump lasers are the key components in optical fiber amplifier. Thermal management for
the telecom applications is a key design parameter for both package and system level. In this paper, based on the
designed structural and material parameters of Epi-down bonded uncooled 980nm laser, the heat distribution of Epi-down
bonded uncooled pump laser was simulated using the finite element method, and the photoelectric properties of
designed and packaged module were tested. A fiber output power of 200mW was achieved for the Epi-down bonded
uncooled 980nm laser with fiber Bragg grating, and module can work steadily over a wide temperature range of 0~70°C, with a small wavelength shift of 0.2nm, along with a FWHM less than 1.1nm, and a SMSR of more than 45dB.
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.