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ML1XX25 series
Industry top-level pulse output of 250mW
Ideal for 16x-speed DVD recording
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Outline
The recording velocity for record-type DVD devices continues to increase. These devices are spreading rapidly as an external memory units for personal computers, etc. During production was scheduled for DVD record-type devices corresponding to the maximum DVD record velocity:16x-speed. To record high volumes of data in a short time on these DVD devices, high output semiconductor lasers become necessary. Our company has already started mass production of high red output semiconductor laser ML1XX23 series with optical output of 200mW. To secure cost reductions in the optical pickup par and a recording margin in the various DVD±R disks this time, however, we continued to optimize the element structure and delivered the top level optical output of 250mW for record-type DVD device applications.
Features
A low operating current realized by adopting a low loss optical waveguide structure. (Typical 310mA @Tc= at 25°C, Po= 250mW: pulse)
High enough kink characteristics* compatible with optical output 250mW.
75°C high temperature actuation.
Superb reliability realized by the adoption of the terminal face window structure**.
  *Non-linearity in the optical output-current characteristics of LD. When a kink appears, it restricts the effective maximum optical output.
  **The LD's optical output terminal face is treated so that it does not absorb any laser light. It enables high optical output and high reliability, by avoiding crystal disruption (momentary terminal face disruption phenomenon) caused by heat produced by the absorption of light in the terminal face.
Applications
ideal for record-type DVD drives (16x-speed recording).
Future deployment
While we have realized the highest velocity of 16x speed for DVD recording, it is believed that 2-layer disks with double the recording capacity will spread in future. More than double the optical output is required for 2-layer disks, compared to single layer disks. In order to launch it on the market quickly, we are proceeding to develop as the next model a 300mW class, optical output product suitable for 8x-speed 2-layer disk recording.
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