LightTime to Unveil New Laser Techology for Microprocessor Clocking at Photonics West 200617 January 2006
LightTime™ LLC (www.LightTime.com), a developer of high-performance optoelectronics technology, today announced that the Company's photonic clocking technology will be presented at Photonics West 2006. Dr. James Siepmann, LightTime's Chief Research Officer, will be presenting "Scalable Passively Mode-locked Semiconductor Lasers for Microprocessor Clocking," which describes LightTime's high performance optical clock technology based on a new internal cavity passively modelocked laser design.
LightTime's design, based on the Company's LightClock technology (patents pending), is a breakthrough in the development of inexpensive lasers for photonic timing. Until now, photonic clock options such as external cavity modelocked or modulated lasers were too complex and expensive for most applications. LightTime has developed an internal cavity design using a new experimentally validated approach to saturable absorber implementation and facet coating, overcoming previous problems such as low average power and high jitter. Furthermore, the design was developed on a material system amenable to low-cost, high volume manufacturing, a basic requirement in microprocessor and other silicon chip applications.
Clock rates can range from 9-100+ GHz, with wavelengths from 800-1100+ nm. LightClocks interface with microprocessors in various formats, including flipchip, fiberoptic, planar waveguide, or customer-specified methods. Layer thicknesses and materials are the same for all clock rates and wavelengths, so that no significant changes in manufacturing lines are needed for different rates/wavelengths. By having a version that operates at over 1100 nm, LightTime is also able to offer integration with silicon waveguides that are transparent at these wavelengths.
LightTime's design achieves modelocking passively and monolithically without an external cavity structure, enabling low cost volume production. Compared to conventional electronic clocking, LightClocks have reduced microprocessor skew/jitter and have no RFI/EMI issues. LightClocks also substantially reduce on-chip clocking and signal distribution power consumption and heat generation. The design utilizes internal saturable absorbers to passively modelock a semiconductor laser in single spatial mode operation, with high peak powers. Experimental data show an RF power spectrum signal peak that is at least 40 dB above the noise floor with a -10 dB width less than 1 MHz. RMS jitter was measured at approximately 1 ps, and modelocking and pulse width were confirmed by autocorrelation.
For Further Information Contact:
Bob Potenza
(650) 525-9806
Email Contact
SOURCE: LightTime, LLC
Source: marketwire
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