AXT To Offer VCSELs And 980 Nm Lasers (Fiber Optics News)
AXT has announced that it will begin volume production of two types of laser, 980 nm Fabry Perot edge-emitters and ion-implanted VCSELs, adding to its substrate and nitride LED product lines. AXT recently ceased production of visible laser diodes, but is now leveraging its GaAs laser manufacturing capabilities to introduce these new products. AXT gained these facilities with the acquisition of Lyte Optronics. Lasers operating at 980 nm, which are used to pump EDFAs, are in heavy demand. AXT s devices exhibit stable singlemode operation with output power up to 200 mW, with threshold currents below 10 mA and slope efficiency better than 0.9 W/A. The company says initial reliability tests have been favorable and long-term tests are currently under way. The lasers are offered as unpackaged chips or in standard TO-cans, and with either Al-containing or Al-free active regions (i.e. InGaAsP or AlGaInAs). The use of Al-free active regions has been purported to reduce the occurrence of catastrophic optical mirror damage of the mirror facets under high-power operation. AXT s ion-implanted VCSELs are designed for applications such as coarse wavelength-division multiplexing (or CWDM) data communications, in which a number of devices with wavelengths Devices will be available in the 780870 nm wavelength range; these have 13 mW output power and are capable of modulation up to 2.1 GHz. "We continue to leverage our highly efficient manufacturing capabilities in edge-emitters with the introduction of 980 nm technology," claimed AXT s CEO Morris Young. Young added that the CWDM market for VCSELs is growing rapidly. "We have made great strides in the development of our VCSEL technology over the past several months, and continue to invest heavily in this area. AXT is committed to being a leader in the VCSEL arena."