High-Power Tapered Unstable-Resonator Laser Diode With a Fiber-Bragg-Grating Reflector

Micro-integrated high-power narrow-linewidth external-cavity tapered diode laser at 808 nm

“…The second approach is preferred since the additional single-mode master oscillator is not needed. In that approach, different frequency-selective elements are implemented to achieve a narrowlinewidth tapered diode laser system, e.g., bulk diffraction gratings [11,13], fiber Bragg gratings [9,14], narrowband interference filters [15], phase conjugate mirrors [10] and volume Bragg gratings (VBGs) [12,16 ]. VBGs based on photosensitive glasses are key elements for achieving a compact and relatively temperature insensitive wavelength-stabilized narrow-linewidth diode laser [17].…”

Design and performance evaluation of a dispersion compensation unit using several chirping functions in a tanh apodized FBG and comparison with dispersion compensation fiber

“…Among these, the FBG has attracted huge interest for the design, testing, and evaluation of dispersion compensation units, as its effectiveness is due mainly to its complete passiveness, compactness, relatively low cost, low insertion loss, fiber compatibility, and lack of nonlinear effects [8]. Note that FBG is used in a huge range of optical telecommunication applications other than dispersion compensation, such as fiber laser reflectors [9,10], wavelength division multiplexing (WDM) devices [11], optical pulse compression [12], tunable optical delay [13], optical filters [14,15], optical signal generation/shaping [16][17][18], and optical sensors [19,20].…”

Red Tunable High-Power Narrow-Spectrum External-Cavity Diode Laser Based on Tapered Amplifier

“…The tapered laser devices can be used in applications where narrowspectrum is not needed such as photodynamic therapy, but for other applications such as a pump source for UV light generation, the spectral quality of these devices has to be improved. In order to improve the spectral quality of a tapered laser, different techniques are applied, such as a monolithically integrated master oscillator power amplifier by forming Bragg gratings in the semiconductor material (O'Brien et al, 1993(O'Brien et al, , 1997a, injection locking to an external single-mode laser Mehuys et al, 1993b;O'Brien et al, 1997b;Wilson et al, 1998;Ferrari et al, 1999;Spieβberger et al, 2011), and different external-cavity feedback techniques (Jones et al, 1995;Cornwell & Thomas, 1997;Morgott et al, 1998;Goyal et al, 1998;Pedersen & Hansen, 2005;Chi et al, 2005;Lucas-Leclin et al, 2008;Tien et al, 2008;Sakai et al, 2009). Up to 1 W output power at 668 nm from a Fabry-Perot tapered diode laser was obtained with a beam quality factor of 1.7, and the spectral width was smaller than 0.2 nm .…”