Efficiency and uniformity considerations in optical coherent transient devices
نویسندگان
چکیده
The efficiency and uniformity of photon echoes are investigated in optical coherent transient sequences using temporally overlapped linear frequency-chirped programming pulses. Distortions in the power spectrum of the programming pulses due to edge effects are found to cause fluctuations in echo efficiency as a function of echo time delay. Smoothing the edges of the programming pulse envelopes is found to significantly reduce distortion in the power spectrum of the pulses, which leads to echoes that are both more efficient and more uniform than those generated by pulses without smoothed edges. The effect of programming pulse strength on echo efficiency and uniformity is shown and discussed through simulations for an optically thin medium and through experiment in Tm3+:YAG at 4 K. © 2006 Optical Society of America OCIS codes: 030.1670, 070.6020, 300.6240.
منابع مشابه
Reduced loss and improved mode discrimination in resonant optical waveguide arrays
Coherent laser arrays designed using resonant optical waveguides (ROWs) have proven to offer one of the most promising methods of monolithic beam combining in diode lasers. However, the high lateral transmission that provides strong optical coupling also leads to increased loss – a detriment to laser efficiency and performance. Presented is a derivation of additional design rules to eliminate l...
متن کاملDesign of illumination and projection optics for projectors with single digital micromirror devices.
We present a new optical system design for a projector with a single digital micromirror device (Texas Instruments Digital Micromirror Device) that improves on previous designs in terms of optical efficiency, uniformity, and contrast while yielding a low-profile and compact system. A rod integrator is incorporated with a compact relay system to maximize light efficiency and to increase illumina...
متن کاملInfluences of Device Architectures on Characteristics of Organic Light-Emitting Devices Incorporating Ambipolar Blue-Emitting Ter(9,9-diarylfluorenes)
In this article, we report the studies of various device architectures of organic lightemitting devices (OLEDs) incorporating highly efficient blue-emitting and ambipolar carriertransport ter(9,9-diarylfluorene)s, and their influences on device characteristics. The device structures investigated include single-layer devices and multilayer heterostructure devices employing the terfluorene as one...
متن کاملTransient evolutional behaviours of double-control electromagnetically induced transparency
The evolutional optical behaviours (turn-on dynamics) of a four-level double-control tripod-configuration (electromagnetically induced transparency) system are considered based on the transient solution to the equation of motion of the probability amplitudes of the atomic levels. As the most remarkable property (quantum interference between the two control transitions) will arise in the present...
متن کاملStatistical optics and optical elements for microtechnologies: Partial coherence, lithography and microlenses
The scientific problems treated in this thesis are expressed within the framework of statistical optics and are generated out of the optical lithography industry. Optical lithography uses partially coherent light, i.e. light with a random wavefront, to increase the performance of the lithographic process. One of the goals of this work has been to explore ways to numerically simulate the behavio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006