Quantum Cascade Laser

Transcription

1 Quantum Cascade Laser Front: QCLs Back: Set-up examples with exclusive accessories Quantum Cascade Lasers are semiconductor lasers that offer peak emission in the mid-ir range (4 µm to 10 µm). They have gained considerable attention as a new light source for mid-ir applications such as molecular gas analysis. Applications Mid-IR laser (4 µm to 10 µm) Compact, lightweight Trace gas analysis Environmental measurement, Combustion gas measurement, Plasma measurement, In vivo gas analysis IR molecular spectroscopy Chemical sensing, Molecular oscillation

2 LGQF AU QCL LINEUP DFB-CW Type Quantum Cascade Lasers, using structures of SPC (Single Phonon-Continuum) depopulation and DFB (Distributed Feedback), emit CW (Continuous Wave) mid-ir laser under room temperature. By controlling the chip's operating temperature through the Peltier element installed in the HHL package, it is possible to tune the emission wavelength without mode hopping while keeping longitudinal single mode operation. HHL package Type No. L H-C L H-C L H-C L H-C Wavelength Typ. 4.7 µm.26 µm 6.13 µm 7.73 µm Operating temperature (QCL) (*1) Line width (*2) Tunable range (*3) Condition: K=2190 cm-1 (*) Condition: K=1900 cm-1 (*) Condition: K=1631 cm-1 (*) Condition: K=1294 cm-1 (*) Output power 20 mw 20 mw 20 mw 20 mw (*1) This specifies the temperature range within which the target emission wavenumber (K) can be realized. (*2) Full-width half maximum (*3) This specifies the continuous tunable range (without mode hopping). The center wavenumber of the tuning range is the emission wavenumber (K). (*4) The figures are limited by the resolution and signal/noise ratio of the measuring instruments used. (*) K: Emission wavenumber (cm -1 ) Threshold Side-mode suppression ratio current (SMSR) 1.0 A Condition: T op(cl)= A Condition: T op(cl)= A Condition: T op(cl)= A Condition: T op(cl)=20 Characteristics examples L H-C L H-C Top(cl)=20 Top(cl)= Top(cl)= FORWARD CURRENT I f (A) Top(cl)=20 Top(cl)= Top(cl)= FORWARD CURRENT I f (A) L H-C Top(cl)=20 Top(cl)= Top(cl)= FORWARD CURRENT I f (A) L H-C Top(cl)=10 Top(cl)=20 Top(cl)= FORWARD CURRENT I f (A) δkt If fixed Current coefficient δkc Top(cl) fixed δkt If fixed Current coefficient δkc Top(cl) fixed δkt If fixed Current coefficient δkc Top(cl) fixed δkt If fixed Current coefficient δkc Top(cl) fixed cm -1/ cm -1/mA cm -1/ cm -1/mA -0.1 cm -1/ cm -1/mA -0.1 cm -1/ cm -1/mA Dimensional outline (unit: ) HHL package ± (22.86) 26.4 ertyuio! ± Direction of laser beam 14.8 (*1) Tolerance is +/- 0.2 unless specified. (*2) Edge of QCL chip and outside of the package PIN No. (*3) FUNCTION TEC Cathode (-) e r QCL Anode (+) t Thermistor (Top(cl)) y Thermistor (Top(cl)) Window 4.4 A B Emitter position A=B=16.0±0.3 Laser chip Direction of laser beam 1.9±0.4 (*2) PIN No. (*3) FUNCTION u QCL Cathode (-) i Thermistor (Top(c)) o Thermistor (Top(c))!0 TEC Anode (+) (*3) e is electrically connected to the package. The other pins are electrically isolated from the package. CLASS 3B LASER Invisible Laser Radiation: Avoid Exposure to Beam The Laser emits invisible laser radiation. The instrument which used the LASER, operated under ordinary conditions, is classified as Class 3B according to the laser product classification code IEC See IEC , -14 for more details and safety operation concerning the above countermeasures. INVISIBLE LASER RADIATION AVOID EXPOSURE TO BEAM MAXIMUM OUTPUT PULSE DURATION WAVELENGTH CLASS 3B LASER PRODUCT IEC :2007 CLASS 3B LASER PRODUCT Warning label Explanatory label

3 LGQF110401BT DFB-Pulsed Type Quantum Cascade Lasers, using structures of SPC (Single Phonon-Continuum) depopulation and DFB (Distributed Feedback), emit pulsed mid-ir laser under room temperature. By controlling the chip's operating temperature through the Peltier element installed in the TO-8 package, it is possible to tune the emission wavelength without mode hopping while keeping longitudinal single mode operation. TO-8 package Type No. L T-C L T-C L T-C L T-C Wavelength Typ µm.26 µm 6.13 µm 7.82 µm Operating temperature (QCL) (*1) Line width (*2) Tunable range (*3) Condition: K=2231 cm-1 (*) Condition: K=1901 cm-1 (*) Condition: K=16 cm-1 (*) Condition: K=1278 cm-1 (*) Pulsed output power 0 mw 0 mw 0 mw 0 mw Threshold current Standard driving conditions: t w=10 ns, f r=200 khz, T op(cl)=20 (*1) This specifies the temperature range within which the target emission wavenumber (K) can be realized. (*2) Full-width half maximum (*3) This specifies the continuous tunable range (without mode hopping). The center wavenumber of the tuning range is the emission wavenumber (K). (*4) The figures are limited by the resolution and signal/noise ratio of the measuring instruments used. (*) K: Emission wavenumber (cm -1 ) 1. A 1. A 1. A 1. A Side-mode suppression ratio (SMSR) Characteristics examples L T-C OPERATING TEMPERATURE (QCL) T op(cl) () L T-C OPERATING TEMPERATURE (QCL) T op(cl) () L T-C OPERATING TEMPERATURE (QCL) T op(cl) () L T-C OPERATING TEMPERATURE (QCL) T op(cl) () δkt Ifp fixed δkt Ifp fixed -0.1 cm -1/ cm -1/ Ifp δkt fixed cm -1/ δkt Ifp fixed cm -1/ Dimensional outline (unit: ) TO-8 package Window material Emitter MAX. ( 0.4) 0.8! ± Direction of laser beam PIN No. FUNCTION PIN No. FUNCTION w e r t y TEC Cathode (-) TEC Anode (+) QCL Anode (+) QCL Anode (+) u i o!0!1!2 QCL Anode (+) QCL Anode (+) Thermistor (Top(cl)) Thermistor (Top(cl)) * All the pins are electrically isolated from the package ± 0.4 (0.4) 12.4 ± ± 1.0 Emitter BOTTOM VIEW PIN No.!3!4!!6 CLASS 3R LASER Invisible Laser Radiation: Avoid Direct Exposure of eyes to Beam The Laser emits invisible laser radiation. The instrument which used the LASER, operated under ordinary conditions, is classified as Class 3R according to the laser product classification code IEC See IEC for more details and safety operation concerning the above countermeasures. FUNCTION QCL Cathode (-) QCL Cathode (-) QCL Cathode (-) QCL Cathode (-) INVISIBLE LASER RADIATION AVOID DIRECT EYE EXPOSURE MAXIMUM OUTPUT PULSE DURATION WAVELENGTH CLASS 3R LASER PRODUCT IEC :2007 CLASS 3R LASER PRODUCT Warning label Explanatory label

4 PERIPHERAL INSTRUMENTS AND ACCESSORIES HHL Mount A11709 Series A Forced air cooling A Water cooling * Mounts shown in photos have HHL package QCL. Cooling method Maximum heat discharge power Thermal resistance A Forced air cooling Approx. (*1) Approx. 0. (*1) A Water cooling Approx. 0 (*2) Approx. 0.3 (*2) Applicable package Operating temperature HHL 0 to +40 Size (W H D) Weight W /W kg (*1) DC fan speed 7600 min -1 at ambient temperature 2 (*2) Necessary flow rate and water temperature: 2000 cc/min. at 20 Cooling for HHL packaged QCL. Two types of cooling, forced air and water, are available. An Aspheric ZnSe Lens A xH can be mounted. Two types of cooling (water, forced air) are available. Easy to mount Easily set on optical tables Can be mounted to the lens unit A xH TO-8 Pulse Driver C1163 Output current Output current range Pulse width (Typ.) Rise / fall time (Typ.) Repetition freuency Duty ratio Dimensions (W H D) Weight Symbol I(pulse) P w T r DR Value 0 to 3 10 Approx. 10 khz to Approx. 1 MHz < A ns ns % kg * Driver shown in photo has a TO-8 package QCL. Pulsed QCL Driver for TO-8 packaged pulsed QCL. It outputs low noise pulsed current, and TO-8 packaged pulsed QCL can be mounted directly. An Aspheric ZnSe Lens A xH can be mounted. Can be connected to TO-8 package QCL Pulse width: 10 ns (Typ.) Repetition freuency: <1 MHz Low noise, high stability Designed to be built into an instrument Setup example TO-8 QCL (*1) OSCILLOSCOPE 0 Ω TERMINAL C1163 (*1) TO-8 package QCL is sold and supplied separately from the pulse driver. HV INPUT (DC) 0 V to +36 V V (ic) INPUT (DC) +12 V (Typ.) TEC CONTROLLER for TO-8 EXTERNAL INPUT * can be mounted to aspheric lens unit A xH. * repetition freuency up to 2 MHz * pulse width down to 40 ns (repetition freuency < 00 khz) * pulse width up to 1000 ns (repetition freuency < 100 khz) * external trigger operation by removing the oscillating board TEC Driver C113 Series Peltier TEC (thermoelectric cooler) driver is used to control QCL temperature with high accuracy and high stability. Designed to be built into an instrument. High accuracy, high stability Temperature stability: 0.01 TEC heatsink monitoring function Bipolar output, digital PID control Applicable package TEC output (*1) Temperature sensor (*2) Temperature control TEC control current Compliance voltage Thermistor RTD sensor Temperature control range (Thermistor/RTD) Setup resolution Temperature stability Control freuency Control algorithm Host interface Main body size (W H D) Weight C HHL -8 to +8 C TO to +1.9 ±24 NTC, 2 lines 3-line platinum temperature measurement resistance (Pt100) -0 to +12 / -0 to ±0.01 (Typ.) 0.1 to 100 Digital PID loop (*3) RS-232C, RS A V s kg (*1) Actual output depends on characteristics of the connected load (TEL module), input power supply voltage, and current. (*2) Thermistor and Pt100 cannot be used simultaneously; select one of them. (*3) Auto-tuning function can be set by the host interface. * This can be controlled from a PC through RS-232C or RS-422.

5 Cables HHL Socket Cable A A No. A B Name HHL connector Terminal 9 pin socket TEC drive cable Cut-off 4PS (8 wires) B C C QCL drive cable Cut-off 2PS (4 wires) Terminals B and C are to be modified in accordance with the type of TEC and power supply. Pin layout e r t y u i o!0 Braided outer shield SP1 SP2 SP3 SP4 Braided outer shield SP SP6 White Red Green Yellow White Red!0!0 t y i o r u r u Signal Cable for C113 A Dimensional outline (unit: ) D-Sub 9 pin Female 2 m High density D-Sub 1 pin Male Inch screw #4-40 Milli screw M2.6 Wire for interlock circuit PC Side D-Sub 9 pin layout Pin No Signal DCD RxD TxD DTR GND DSR RTS CTS RI D-Sub 9 pin Female Interlock Frame Ground High density D-Sub 1 pin Male C113 Side High density D-Sub 1 pin layout Pin No Signal INTERLOCK ALARM RS-422 Rx+ RS-422 Tx+ RS-232C Rx GND GND GND Pin No. Signal 9 GND 10 Frame Ground 11 START 12 STABLE 13 RS-422 Rx- 14 RS-422 Tx- 1 RS-232C Tx Heatseeker A10767 Heatseeker A10767 consists of 2 types of thermal viewing card and an alignment target. It can be used for visualization and alignment of the QCL laser beam. Thermal Viewing Card Thermal material provides visibility of the IR laser beam. Facilitates tracing of the invisible laser beam. Two cards with different sensitivity ranges are provided. Alignment Target The light axis of the invisible IR laser beam can be easily aligned. Includes a cross target for checking the light axis. Thermal viewing card can be inserted. Detectable Thermal viewing card #01 temperature range Thermal viewing card #02 Usable wavelength range Power reuired for visibility (*1) Damage threshold ( power density) Maximum aperture Storage temperature Dimensions (W H D) (*1) Average power density Description / value 18 to 32 to to 20 > to +60 (No condensation) µm mw/ 2 mw/ 2 Dimensional outline (unit: ) 0 Crossing wire 10 ( 0.3) Laser beam 2 Post 12(g6) 0

6 PERIPHERAL INSTRUMENTS AND ACCESSORIES Lens / Lens Aspheric ZnSe Lens for QCL. It can be installed into an Aspheric ZnSe Lens A xH, and can be mounted onto HHL Mount A11709 series and Pulsed QCL Driver C1163. Aspheric ZnSe Lens A x * When using the lens by itself, a lens holder is reuired. Symbol Primary design wavelength λ Numerical aperture (NA) NA Effective diameter CA Actual focal distance EFL Working distance WD Periphery OD Center thickness CT Edge thickness ET Material Refractive index n AR coating Weight A ± at 8 µm BBAR, T (ave)>97 % (*1) (*1) T (ave): Average transmittance at wavelength 8 µm to 12 µm (*2) T (ave): Average transmittance at wavelength 4 µm to 8 µm to ZnSe A ± at µm BBAR, T (ave)>96 % (*2) µm g ET A A BBAR / 8 µm to 12 µm BBAR / 4 µm to 8 µm CA WD CT OD Transmittance (%) Wavelength (µm) Transmittance (%) Wavelength (µm) Aspheric ZnSe Lens A xH Lens mounting unit XYZ translator Applicable lens X/Y movable range x in the suffix of the part number indicates the type of embedded lens. Value A or A ±1 Dimensional outline (unit: ) O-Ring 1 Usage example A xH can be mounted on HHL mount A11709 series and pulsed QCL driver C Laser 1.03" WD CA Mounted on A Mounted on A Mounted on C ± " Locking set screws 2-M2.6

7 CONNECTION EXAMPLE DFB-CW QCL 1DFB-CW QCL (L12004, L1200, L12006, L12007 Series) 2Peltier TEC Driver C Forced Air Cooling HHL Mount A or Water Cooling HHL Mount A Aspheric ZnSe lens A x and/or Lens unit A xH (Select a suitable Aspheric ZnSe Lens in accordance with the QCL's emission wavelength.) Cable A Laser Power Supply DFB-Pulsed QCL 1DFB-Pulsed QCL (L12014, L1201, L12016, L12017 series) 2Peltier TEC Driver C Pulsed QCL Driver Module C1163 4Aspheric ZnSe lens A x and/or Lens unit A xH (Select a suitable Aspheric ZnSe Lens in accordance with the QCL's emission wavelength.) Cable A Read carefully before using QCL For safe and effective use of a QCL, carefully read the documents that came with the purchased goods. Also, read carefully to the end of manuals and instructions, and observe the local law regulations about using lasers.! Warning This catalog is not a guarantee of product perfection. When the products are used in an instrument which may cause bodily harm or damage properties, it is dangerous to operate the instrument unless proper safety measures are taken against possible product defects.! Caution Absolute maximum ratings Absolute maximum ratings listed in the specification sheet and/or test sheet are limiting values that must not be exceeded even momentarily. Using this product under conditions where any one of the maximum ratings is exceeded may cause serious and irreparable damage to the products. Values in absolute maximum ratings for forward current and forward voltage differ in each product, so always check the values listed in the test sheet that comes with each product and make sure that these values are not exceeded. Laser driver power supply Current surges and current fluctuations may impair performance of the laser device. Do not apply reverse current and reverse voltage to the QCL. Heat dissipation This product uses a Peltier element to control temperature of the laser device, so the Joule heat generated in this product must be dissipated. If operated with poor heat dissipation, the device temperature may soon exceed the absolute maximum rating for the operating case temperature listed in specification sheet. Make sure that a proper heatsink is installed on the product. Poor heat dissipation may lead to excessive heating during operation and cause device deterioration or open-circuit faults even if the Peltier current is within the maximum rating. Heat dissipation on the laser side may not be sufficient when supplying electrical current to the Peltier element in heating mode, and cause failures or affect reliability. Carefully check these points before actual operation.

8 HAMAMATSU PHOTONICS K.K. HAMAMATSU PHOTONICS K.K., Laser Group, Sales Dept , Shinmiyakoda, Kita-ku, Hamamatsu City, Shizuoka, , Japan, Telephone: (81) , Fax: (81) , U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J , U.S.A., Telephone: (1) , Fax: (1) Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D Herrsching am Aersee, Germany, Telephone: (49) , Fax: (49) France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, Massy Cedex, France, Telephone: (33) , Fax: (33) infos@hamamatsu.fr ed Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, ed Kingdom, Telephone: 44-(0) , Fax: 44(0) info@hamamatsu.co.uk North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE SOLNA, Sweden, Telephone: (46) , Fax: (46) info@hamamatsu.se Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, Arese, (Milano), Italy, Telephone: (39) , Fax: (39) info@hamamatsu.it China: Hamamatsu Photonics (China) Co., Ltd.: 1201 Tower B, Jiaming Center, No.27 Dongsanhuan Beilu, Chaoyang District, Beijing , China, Telephone: (86) , Fax: (86) hpc@hamamatsu.com.cn Cat. No. LQCL2001E03 SEP IP (1000)