AK2572 Datasheet, PDF (20/50 Pages) Asahi Kasei Microsystems – APC for Burst Mode Applicable Direct Modulation Laser Diode

ASAHI KASEI
[AK2572]
Table 4-7 Relation of APC Operation Setting and Register Retaining Temperature Compensation Data
RE_APC_
FF_SET
RE_APC_
FB_SET
RE_APC_
INIT_SET
E_BIAS_TC [*1]
(Temperature compensation
Data for I-DAC2)
E_MOD_TC [*1][*2]
(Temperature compensation
Data for I-DAC1or V-DAC3)
00 (0)
x
－
－
01 (1)
0
1
－
－
－
R_APC_FBIV
00 (0)
10 (2)
0
1
－
R_APC_FBIV
－
－
11 (3)
0
1
－
R_APC_FBIV
－
－
00 (0)
x
－
R_MOD_FF
01 (1)
0
1
01 (1)
10 (2)
0
1
－
－
R_APC_FBIV
Prohibited
R_MOD_FF
R_MOD_FF
R_MOD_FF
11 (3)
0
1
－
R_APC_FBIV
R_MOD_FF
R_MOD_FF
00 (0)
x
R_BIAS_FF
－
01 (1)
0
1
10 (2)
10 (2)
0
1
R_BIAS_FF
R_BIAS_FF
R_BIAS_FF
Prohibited
－
R_APC_FBIV
－
11 (3)
0
1
R_BIAS_FF
－
Prohibited
11 (3)
xx
x
R_BIAS_FF
R_MOD_FF
ï¼»*1ï¼½ As to the EEPROM memory space of E_BIAS_TC, E_MOD_TC, refer to Table 9-3.
ï¼»*2ï¼½ By RE_MODV_SEL setting, DAC (either I-DAC1 or V-DAC3) loading the temperature
compensation data retained in E_MOD_TC is selected. Refer to Table 3-4.
ï¼»*3ï¼½ Register content
Register
Content
Note
R_BIAS_FF
Bias current data (APC_FF)
Set to I-DAC2
R_MOD_FF Modulation current data (APC_FF)
Set to either I-DAC1 or V-DAC3.
R_APC_FBIV
APC_FB initial data.
Added to the APC_FF value after
dividing calculation.
-20-
<MS0290-E-01>
2004/8