Image sensor for DWDM wavelength monitor

G9201 to G9204 series

InGaAs linear image sensors

www.hamamatsu.com

1

The G9201 to G9204 series are InGaAs linear image sensors designed for WDM monitor detectors in optical communications.

These linear image sensors contain a CMOS charge amplifier array, a CDS circuit, an offset compensation circuit, a shift register

and a timing generator, along with an InGaAs photodiode array, and deliver high sensitivity and stable operation in the near in-

frared range. The package is hermetically sealed for high reliability and the light input window has an anti-reflective coating to

improve the light detection efficiency.

The signal processing circuit on the CMOS chip allows selecting two conversion efficiencies (CE) by external voltage. A wide dy-

namic range can be obtained when the image sensor is operated at CE=16 nV/e-, while a high gain can be obtained at CE=320

nV/e-.

Applications

Options

DWDM wavelength monitor

Optical spectrum analyzer

Features

Wide dynamic range

Low noise and low dark current

Offset compensation circuit

Two selectable conversion efficiencies

Anti-saturation circuit

High resolution: 25 μm pitch (512 ch)

Low crosstalk

256 ch: 1 video line

512 ch: 2 video lines

Selection guide

Type no.

Cooling

Image size Number of

total pixels

Number of

effective pixels

Spectral response range

Defective

pixels

Appilcable

multichannel

detector head

(mm)

(μm)

G9201-256S

One-stage TE-cooled

12.8 × 0.25

256

256

0.9 to 1.67 (-10 °C)

0

C8061-01

G9202-512S

One-stage TE-cooled

512

512

0.9 to 1.67 (-10 °C)

C8061-01

Non-cooled

12.8 × 0.50

256

256

0.9 to 1.7 (25 °C)

-

G9203-256S

One-stage TE-cooled

256

256

0.9 to 1.67 (-10 °C)

C8061-01

Non-cooled

512

512

0.9 to 1.7 (25 °C)

-

G9204-512S

One-stage TE-cooled

512

512

0.9 to 1.67 (-10 °C)

C8061-01

*1: A major source of noise in charge amplifiers is the reset noise generated when the integration capacitance is reset. A CDS circuit

greatly reduces this reset noise by holding the signal immediately after reset to find the noise differential.

*2: In conventional image sensor operation, external PLD (programmable logic device), etc. is used to input the required timing signals.

However, the G9201 to G9204 series image sensors internally generate all timing signals on the CMOS chip just by supplying CLK

and RESET pulses. This makes it simple to set the timings.

*3: The G9203-256D and G9204-512D are not available for the C7557-01.