High-power 1300-nm Fabry-Perot and DFB ridge-waveguide lasers

Abstract

In this paper we summarize the results [1] on the development of high power 1 300 nm ridge waveguide Fabry-Perot and distributed-feedback (DFB) lasers.Improved performance of MOCVD grown InGaAsP/InP laser structures and optimization of the ridge waveguide design allowed us to achieve more than 800 mW output power from 1300 nm single mode Fabry-Perot lasers. Despite the fact that the beam aspect ratio for ridge lasers (300 x 12°) is higher than that for buried devices, our modeling and experiments demonstrated that the fiber coupling efficiency of about 75-80% could be routinely achieved using a lensed fiber or a simple lens pair. Fiber power of higher than 600 mW was displayed.Utilizing similar epitaxial structures and device geometry, the 1300 nm DFB lasers with output power of 500 mW have been fabricated. Analysis of the laser spectral characteristics shows that the high power DFB lasers can be separated into several groups. The single frequency spectral behavior was exhibited by about 20 % of all studied DFB lasers. For these lasers, side-mode suppression increases from 45dB at low current up to 60 dB at maximum current. About 30 % of DFB lasers, at all driving currents, demonstrate multi-frequency spectra consisting of 4-8 longitudinal modes with mode spacing larger than that for Fabry-Perot lasers of the same cavity length. Both single frequency and multi frequency DFB lasers exhibit weak wavelength-temperature dependence and very low relative intensity noise (RIN) values.Fabry-Perot and both types of DFB lasers can be used as pump sources for Raman amplifiers operating in the 1 300 nm wavelength range where the use of EDFA is not feasible. In addition, the single-mode 1 300 nm DFB lasers operating in the 500 mW power range are very attractive for new generation of the cable television transmission and local communication systems.Keywords: ridge-waveguide 13 10 nm high-power diode laser, distributed feedback laser, relative intensity noise.

Recent advances in the design and experimental implementation of fiber optical parametric amplifiers

“…Probably the best prospects for making such lasers rest with semiconductor lasers, since they can in principle be made at any wavelength of interest. Single-frequency semiconductor lasers with singlemode fiber output power in excess of 0.5 W at 1300 nm have been fabricated [34]. Similar devices could in principle be made at other wavelengths.…”

Current status of fiber optical parametric amplifiers

“…Probably the best prospects for making such lasers rest with semiconductor lasers, since they can in principle be made at any wavelength of interest. Single-frequency semiconductor lasers with singlemode fiber output power in excess of 0.5 W at 1300 nm have been fabricated [40]. Similar devices could in principle be made at other wavelengths.…”

Research of Frequency Characteristics and Temperature Drift Power Quantum-Well Lasers

“…1 (a) and (b) respectively. In order to perform a quantitative check of the calculation method offered the experimental results, received for QW power lasers with similar resonator length L = 3 mm, with the bias current ratio and working temperature at the continuous operating mode, were used (these results are shown in [7]). The results utilized confirm sufficient correspondence to the theory: the maximal deviation does not exceed 15 %.…”