Title :
High-temperature single-mode operation of 1.3-μm strained MQW gain-coupled DFB lasers
Author :
Lu, H. ; Blaauw, C. ; Makino, Tatsuya
Author_Institution :
Bell-Northern Res., Ottawa, Ont., Canada
fDate :
6/1/1995 12:00:00 AM
Abstract :
Single-mode and high-power operation at temperatures up to 120/spl deg/C has been achieved in 1.3-μm strained MQW gain-coupled DFB lasers. A stable lasing wavelength is maintained due to a large modal facet loss difference of the two Bragg modes, which is provided by the gain-coupling effect. A very low temperature dependence of the threshold current has been obtained by detuning the lasing wavelength to the long wavelength side of the material gain peak at room temperature, which effectively compensates the waveguide loss at higher temperatures. An infinite characteristic temperature T/sub o/ can be realized at certain ranges of temperature depending on the detuning value.
Keywords :
distributed feedback lasers; high-temperature techniques; laser frequency stability; laser modes; laser transitions; optical losses; quantum well lasers; 1.3 micron; 120 degC; Bragg modes; detuning; gain-coupling effect; high-power operation; high-temperature single-mode operation; higher temperatures; infinite characteristic temperature; large modal facet loss difference; lasing wavelength; long wavelength side; material gain peak; room temperature; stable lasing wavelength; strained MQW gain-coupled DFB lasers; threshold current; very low temperature dependence; waveguide loss; Gratings; Laser modes; MOCVD; Optical materials; Optical waveguides; Power lasers; Quantum well devices; Temperature dependence; Temperature distribution; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
