The conventional scheme of optical pick-up unit (OPU) should require two or three optoelectronic integrated circuits
(OEICs) to cover triple-wavelength λ =780nm, 650nm and 405nm). In order to reduce cost and waste of resources, onechip
solution of the OEIC is required. In this paper, the OEIC is designed which can cover triple-wavelength and three
optical storage standards which are compact disk (CD), digital versatile disk (DVD) and Blue-Ray. The OEIC has dualarrays
of photodiodes because focus of laser is varied depending on wavelength. One of arrays senses the laser of
λ =780nm and another senses the lasers of λ =650nm and λ =405nm. For low power consumption and small die area, one
wideband transimpedance amplifier (TIA) is used for two photodiodes which are for CD and DVD or Blue-Ray,
respectively. And two small size switches are included to select photodiodes. The PIN fingerdiode with N+ fingercathode
is integrated to guarantee high performances for λ =405nm and 650nm. And the isolation area between adjacent
photodiodes is made by floated P+ implant for reducing power-loss. The measured cutoff bandwidth of the OEIC is
210MHz for λ =405nm. The OEIC is fabricated in a 0.6- μm BiCMOS technology and dissipates 150mW for a single
supply voltage of 5V. The active area is 1.4x1.2mm2.
OEICs for the advanced optical storage systems are required to be compatible with three kinds of disk systems, CD
(λ=780nm), DVD (λ=650nm) and bluray disk (λ=405nm). In this paper we present a triple wavelength OEIC with
improved isolation areas between adjacent photodiodes, which minimize the dark areas for 405nm laser beam and also
improve the effective photodiode areas for 650nm and 780nm laser beams. The isolation area is made not with pwell and
pbur layer but with floated p+ for increasing the resistance between adjacent photodiodes. The IC was developed in
0.6um BiCMOS technology with integrated N+ finger type photodiodes. A 3-dB frequency response of 163MHz and a
sensitivity of 22mV/uW at the blue laser spectral range (405nm) have been measured. A power consumption of 115mW
at 5V supply is low enough for the commercial bluray pickup unit, and a chip area of 2.88mm2 is achieved. We have got
good jitter performance of 6.8% at the commercial bluray systems.
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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