In optical storage systems, the demand for fast optoelectronic integrated circuit (OEIC) is dramatically increasing
especially for Bluray and HD DVD. A new OEIC for the blue spectral range, which is integrated monolithically using
double epitaxial process that is modified BiCMOS process, is presented in this paper. Proposed OEIC is optimized with
respect to bandwidth, sensitivity, and noise in order to achieve high S/N ratio. Interdigited photodiode achieves a
responsivity of 0.31A/W at blue range corresponding to a quantum efficiency η of 95%, a frequency response of
450MHz and a rising/falling time of 0.578ns. 3dB frequency response of 204MHz and noise of -89.8dBm [1~120MHz
@ RBW=30 KHz] are obtained for the fast channel amplifier. for fast tracking and focusing in a stable servo, offset drift
at the amplifier output was compensated using voltage of bandgap reference.
Recently the demand for high-capacity optical storage systems compatible with CD, DVD, and Blue is growing. We
designed the Vertical NIP photodiode with a diameter of 700um and the trans-impedance circuits by using 0.6um
BiCMOS process. The measured sensitivity of the photodiode is 0.25, 0.42, and 0.48A/W for 405, 650, and 780nm
wavelength lights, respectively. The capacitance of the PD is 4.5pF. Monitor PDIC for detecting triple wavelength lights
is presented in this paper. The complete monitor PDIC with the NIP photodiode of 700um in diameter occupies
1900um*1200um. -3dB bandwidth is 110MHz and the temperature drift of output voltage is 3.2%.
In optical storage systems, the demand for fast optoelectronic integrated circuit (OEIC) is dramatically increasing especially in the blue spectral range (λ=405nm). A new OEIC for the blue spectral range, which is integrated monolithically with the 0.6μm BiCMOS circuit, is presented in this paper. Proposed OEIC is optimized with respect to bandwidth, sensitivity, and noise in order to achieve high S/N ratio. N+ Finger/Nepi/PBL/Psub photodiodeachieves a responsivity of 0.31A/W at blue range corresponding to a quantumefficiency η of 95% [with Optimized ARC for blue range], afrequency response of 450MHz and a rising/falling time of 0.578ns. 3dB frequency response of 204MHz and noise of -91.8dBm [1~120MHz @ RBW=30 KHz] are obtained for the fast channel amplifier. Jitter value of 5.1% is achieved compared to the commercial OEIC of 5.4%.
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